diff --git a/API.article.md b/API.article.md
index 8fe79c3..96b8234 100644
--- a/API.article.md
+++ b/API.article.md
@@ -97,7 +97,7 @@ Creates a new article under a given parent category, allocating a SKU and a defa
 | `input.name` | `string` | The article name. |
 | `[input.desc]` | `string` | The article description text/HTML. |
 | `[input.seo]` | `string` | The article SEO text. |
-| `[input.track_stock=true]` | `boolean|number` | Whether inventory stock is tracked. |
+| `[input.track_stock=false]` | `boolean|number` | Whether inventory stock is tracked. |
 | `[tx]` | `object` | Optional transaction to run within. |
 
 **Returns**
@@ -251,7 +251,7 @@ Imports article rows, creating articles by their SKU and returning per-row impor
 | `[input.rows[].net]` | `number|string` | The POS net price (accepts German decimals). |
 | `[input.rows[].tax]` | `number|string` | The tax rate in percent (e.g. `19`). |
 | `[input.rows[].eans]` | `Array<string>|string` | The EANs to set. |
-| `[input.rows[].track_stock=true]` | `boolean|number` | Whether inventory stock is tracked. |
+| `[input.rows[].track_stock=false]` | `boolean|number` | Whether inventory stock is tracked. |
 | `[input.rows[].parentSku]` | `string` | The parent article SKU for a V/K compound link. |
 | `[input.rows[].deposit]` | `number|string` | The deposit (Pfand) value; currently ignored. |
 | `[tx]` | `object` | Optional transaction. |
@@ -591,7 +591,7 @@ Sets the track_stock flag of an article by its SKU.
 
 **Throws**
 
-`Error` — If trackStock is invalid or the article is not found.
+`Error` — If trackStock is invalid, article not found, or no warehouse exists when enabling.
 
 **Example**
 
diff --git a/API.warehouse.md b/API.warehouse.md
index 1b1d9a9..5096aa0 100644
--- a/API.warehouse.md
+++ b/API.warehouse.md
@@ -37,7 +37,7 @@ const wh = await store.warehouse.create(googleAuthId, { name: 'Hauptlager' });
 
 *Source: `src/store/warehouse/delete.js`*
 
-Deletes a warehouse for the user's selected company, unless referenced in the ledger.
+Deletes a warehouse for the user's selected company, unless referenced in the ledger or it is the last warehouse while articles have stock tracking enabled.
 
 **Parameters**
 
@@ -53,7 +53,7 @@ Deletes a warehouse for the user's selected company, unless referenced in the le
 
 **Throws**
 
-`Error` — If warehouse not found or is in use in the ledger.
+`Error` — If warehouse not found, in use in the ledger, or is the last warehouse with track_stock articles.
 
 **Example**
 
diff --git a/scripts/test-ledger.js b/scripts/test-ledger.js
index f394832..983692d 100644
--- a/scripts/test-ledger.js
+++ b/scripts/test-ledger.js
@@ -47,6 +47,14 @@ async function run() {
       parentId: company.rootCategoryId,
       name: 'Ledger Linked Article',
     });
+    assert.equal(article.track_stock, false, 'Newly created article must have track_stock disabled');
+
+    await assert.rejects(
+      async () => store.article.setTrackStockBySku(googleAuthId, article.sku, true),
+      /At least one warehouse is required to enable stock tracking/,
+      'Should reject enabling stock tracking when no warehouse exists',
+    );
+
     await store.articlesupplier.create(googleAuthId, article.sku, {
       entityId: supplier.id,
       sku: 'SKU-ABC',
@@ -278,6 +286,9 @@ async function run() {
     assert.equal(articleDetail.article.warehouses[1].id, wh1.id);
     assert.equal(articleDetail.article.warehouses[1].sort, 1);
 
+    // Enable stock tracking now that warehouses exist
+    await store.article.setTrackStockBySku(googleAuthId, article.sku, true);
+
     // Add ledger row with warehouse
     const rowWithWh = await store.ledger.add(googleAuthId, {
       manifestarticle_id: manifestarticleId1,
@@ -318,6 +329,38 @@ async function run() {
     const whListAfterDelete = await store.warehouse.list(googleAuthId);
     assert.equal(whListAfterDelete.length, 1);
     assert.equal(whListAfterDelete[0].id, wh1.id);
+
+    // Test last warehouse guard with track_stock articles
+    const freshCompany = await store.company.create({
+      name: 'Warehouse Test Co',
+      iso639: 'de',
+      taxrate: 19,
+      reducedtaxrate: 7,
+      googleAuthId,
+    });
+    await store.google_auth.setSelectedCompany(googleAuthId, freshCompany.id);
+    const testWh = await store.warehouse.create(googleAuthId, { name: 'Only Warehouse' });
+    const testArt = await store.article.createUnderParent({
+      googleAuthId,
+      parentId: freshCompany.rootCategoryId,
+      name: 'Tracked Article',
+      track_stock: true,
+    });
+    assert.equal(testArt.track_stock, true);
+    await assert.rejects(
+      async () => store.warehouse.delete(googleAuthId, testWh.id),
+      /Cannot delete the last warehouse while articles have stock tracking enabled/,
+      'Should reject deleting last warehouse when articles have track_stock enabled',
+    );
+    // Disable track_stock on the article, then deleting the last warehouse must succeed
+    await store.article.setTrackStockBySku(googleAuthId, testArt.sku, false);
+    await store.warehouse.delete(googleAuthId, testWh.id);
+    const remainingWh = await store.warehouse.list(googleAuthId);
+    assert.equal(remainingWh.length, 0);
+
+    // Switch back to original company
+    await store.google_auth.setSelectedCompany(googleAuthId, company.id);
+
     console.log('✓ Warehouse CRUD and ledger enforcement passed');
 
     console.log('✓ All ledger tests passed successfully!');
diff --git a/scripts/test-shipment.js b/scripts/test-shipment.js
index baad3a0..7b9c9bb 100644
--- a/scripts/test-shipment.js
+++ b/scripts/test-shipment.js
@@ -47,12 +47,14 @@ async function run() {
       parentId: company.rootCategoryId,
       name: 'Item A',
       sku: 'ITEM-A',
+      track_stock: true,
     });
     const itemB = await store.article.createUnderParent({
       googleAuthId,
       parentId: company.rootCategoryId,
       name: 'Item B',
       sku: 'ITEM-B',
+      track_stock: true,
     });
 
     // Stock up Item A (20) and Item B (20)
diff --git a/scripts/test-sqlite-storage.js b/scripts/test-sqlite-storage.js
index 2907183..76a5ee7 100644
--- a/scripts/test-sqlite-storage.js
+++ b/scripts/test-sqlite-storage.js
@@ -157,14 +157,27 @@ async function runTests() {
       parentId: cat.id,
       name: 'Test Article',
     });
-    assert.equal(article.track_stock, true, 'Default track_stock must be true');
+    assert.equal(article.track_stock, false, 'Default track_stock must be false');
 
     const fetchedArt = await store.article.getBySku(googleAuthId, article.sku);
-    assert.equal(fetchedArt.article.track_stock, true, 'getBySku must return track_stock: true');
+    assert.equal(fetchedArt.article.track_stock, false, 'getBySku must return track_stock: false');
 
-    await store.article.setTrackStockBySku(googleAuthId, article.sku, false);
+    // Enabling track_stock without a warehouse must fail
+    await assert.rejects(
+      async () => store.article.setTrackStockBySku(googleAuthId, article.sku, true),
+      /At least one warehouse is required to enable stock tracking/,
+    );
+
+    // Create warehouse to allow enabling track_stock
+    await store.warehouse.create(googleAuthId, { name: 'Storage WH' });
+
+    await store.article.setTrackStockBySku(googleAuthId, article.sku, true);
     const afterSet = await store.article.getBySku(googleAuthId, article.sku);
-    assert.equal(afterSet.article.track_stock, false, 'setTrackStockBySku false must update track_stock');
+    assert.equal(afterSet.article.track_stock, true, 'setTrackStockBySku true must update track_stock');
+
+    await store.article.updateBySku(googleAuthId, article.sku, { track_stock: false });
+    const afterDisable = await store.article.getBySku(googleAuthId, article.sku);
+    assert.equal(afterDisable.article.track_stock, false, 'updateBySku track_stock: false must update track_stock');
 
     await store.article.updateBySku(googleAuthId, article.sku, { track_stock: true });
     const afterUpdate = await store.article.getBySku(googleAuthId, article.sku);
diff --git a/scripts/test-stueckliste-stock.js b/scripts/test-stueckliste-stock.js
index 440fa30..c474ba9 100644
--- a/scripts/test-stueckliste-stock.js
+++ b/scripts/test-stueckliste-stock.js
@@ -40,11 +40,13 @@ async function run() {
       googleAuthId,
       parentId: company.rootCategoryId,
       name: 'Component Article 1',
+      track_stock: true,
     });
     const comp2 = await store.article.createUnderParent({
       googleAuthId,
       parentId: company.rootCategoryId,
       name: 'Component Article 2',
+      track_stock: true,
     });
 
     // Create a bundle article
diff --git a/src/providers/mssql/queries/article.js b/src/providers/mssql/queries/article.js
index 8ef3d93..b78a4fd 100644
--- a/src/providers/mssql/queries/article.js
+++ b/src/providers/mssql/queries/article.js
@@ -652,3 +652,9 @@ SELECT
     ) AS articleJson
 FROM auth
 `;
+
+export const CHECK_HAS_WAREHOUSE = `
+SELECT TOP 1 id
+FROM warehouse
+WHERE company_id = @companyId;
+`;
diff --git a/src/providers/mssql/queries/warehouse.js b/src/providers/mssql/queries/warehouse.js
index b9333f5..4d0414d 100644
--- a/src/providers/mssql/queries/warehouse.js
+++ b/src/providers/mssql/queries/warehouse.js
@@ -67,3 +67,16 @@ WHERE id = @id AND company_id = @companyId;
 export const CHECK_LEDGER_USAGE = `
 SELECT TOP 1 id FROM ledger WHERE warehouse_id = @warehouseId;
 `;
+
+export const COUNT_BY_COMPANY = `
+SELECT COUNT(1) AS count
+FROM warehouse
+WHERE company_id = @companyId;
+`;
+
+export const CHECK_TRACK_STOCK_ARTICLES = `
+SELECT TOP 1 id
+FROM article
+WHERE company_id = @companyId AND track_stock = 1;
+`;
+
diff --git a/src/providers/mssql/schema.js b/src/providers/mssql/schema.js
index e832275..7f2ebd6 100644
--- a/src/providers/mssql/schema.js
+++ b/src/providers/mssql/schema.js
@@ -322,7 +322,7 @@ BEGIN
         unit_id INT NOT NULL,
         unitamount FLOAT NOT NULL,
         weight FLOAT NOT NULL,
-        track_stock BIT NOT NULL CONSTRAINT DF_article_track_stock DEFAULT 1,
+        track_stock BIT NOT NULL CONSTRAINT DF_article_track_stock DEFAULT 0,
         brand_id INT NULL,
         articlelist_id INT NULL,
         optionslist_id INT NULL,
@@ -358,7 +358,7 @@ BEGIN
 
     IF NOT EXISTS (SELECT * FROM sys.columns WHERE object_id = OBJECT_ID('article') AND name = 'track_stock')
     BEGIN
-        ALTER TABLE article ADD track_stock BIT NOT NULL CONSTRAINT DF_article_track_stock DEFAULT 1;
+        ALTER TABLE article ADD track_stock BIT NOT NULL CONSTRAINT DF_article_track_stock DEFAULT 0;
     END
 END
 `;
diff --git a/src/providers/sqlite3/index.js b/src/providers/sqlite3/index.js
index 7bd0e86..b10e70c 100644
--- a/src/providers/sqlite3/index.js
+++ b/src/providers/sqlite3/index.js
@@ -456,7 +456,7 @@ export class BetterSqlite3Provider extends BetterSqlite3Executor {
       const articleCols = this.db.pragma('table_info("article")').map((c) => c.name);
       if (articleCols.length > 0 && !articleCols.includes('track_stock')) {
         this.db.exec(
-          `ALTER TABLE article ADD COLUMN track_stock INTEGER NOT NULL DEFAULT 1`,
+          `ALTER TABLE article ADD COLUMN track_stock INTEGER NOT NULL DEFAULT 0`,
         );
       }
       if (articleCols.length > 0 && !articleCols.includes('parentattributename_id')) {
diff --git a/src/providers/sqlite3/queries/article.js b/src/providers/sqlite3/queries/article.js
index dbf3668..90516bd 100644
--- a/src/providers/sqlite3/queries/article.js
+++ b/src/providers/sqlite3/queries/article.js
@@ -3,7 +3,7 @@ import { translateQueries } from './translate.js';
 
 const queries = translateQueries(source, 'article');
 export const {
-  ADD_CATEGORY, ADD_EAN, ARTICLE_LIST_COLUMNS, CREATE, CREATE_CHILD,
+  ADD_CATEGORY, ADD_EAN, ARTICLE_LIST_COLUMNS, CHECK_HAS_WAREHOUSE, CREATE, CREATE_CHILD,
   DELETE_CATEGORIES_BY_ARTICLE, DELETE_EANS_BY_ARTICLE, EAN_EXISTS, EAN_EXISTS_FOR_OTHER_ARTICLE,
   GET_BRAND_BY_COMPANY_AND_ID,
   GET_CATEGORY_ID_BY_SKU, GET_CATEGORY_TREE_FLAT, GET_ID_BY_SKU,
diff --git a/src/providers/sqlite3/queries/warehouse.js b/src/providers/sqlite3/queries/warehouse.js
index 55ccf86..29f1df6 100644
--- a/src/providers/sqlite3/queries/warehouse.js
+++ b/src/providers/sqlite3/queries/warehouse.js
@@ -67,3 +67,17 @@ WHERE id = @id AND company_id = @companyId;
 export const CHECK_LEDGER_USAGE = `
 SELECT id FROM ledger WHERE warehouse_id = @warehouseId LIMIT 1;
 `;
+
+export const COUNT_BY_COMPANY = `
+SELECT COUNT(1) AS count
+FROM warehouse
+WHERE company_id = @companyId;
+`;
+
+export const CHECK_TRACK_STOCK_ARTICLES = `
+SELECT id
+FROM article
+WHERE company_id = @companyId AND track_stock = 1
+LIMIT 1;
+`;
+
diff --git a/src/providers/sqlite3/schema.js b/src/providers/sqlite3/schema.js
index 5b5aa95..67b2c40 100644
--- a/src/providers/sqlite3/schema.js
+++ b/src/providers/sqlite3/schema.js
@@ -221,7 +221,7 @@ CREATE TABLE IF NOT EXISTS article (
     unit_id INTEGER NOT NULL,
     unitamount REAL NOT NULL,
     weight REAL NOT NULL,
-    track_stock INTEGER NOT NULL DEFAULT 1,
+    track_stock INTEGER NOT NULL DEFAULT 0,
     brand_id INTEGER,
     articlelist_id INTEGER,
     optionslist_id INTEGER,
diff --git a/src/store/article/addChild.js b/src/store/article/addChild.js
index fc45197..1959f5f 100644
--- a/src/store/article/addChild.js
+++ b/src/store/article/addChild.js
@@ -177,7 +177,13 @@ export default function addChild(provider) {
 
       // Auto-create child article
       const rawTrack = options.track_stock ?? options.trackStock;
-      const finalTrackStock = rawTrack == null ? parent.track_stock : (rawTrack ? 1 : 0);
+      const finalTrackStock = rawTrack == null ? (parent.track_stock ? 1 : 0) : (rawTrack ? 1 : 0);
+      if (finalTrackStock === 1) {
+        const whRes = await runner.query(queries.CHECK_HAS_WAREHOUSE, { companyId });
+        if (!whRes.rows || whRes.rows.length === 0) {
+          throw new Error('At least one warehouse is required to enable stock tracking');
+        }
+      }
 
       const childRes = await runner.query(queries.CREATE_CHILD, {
         companyId,
diff --git a/src/store/article/createUnderParent.js b/src/store/article/createUnderParent.js
index d89537d..d879dda 100644
--- a/src/store/article/createUnderParent.js
+++ b/src/store/article/createUnderParent.js
@@ -1,5 +1,11 @@
-import { CREATE as MSSQL_CREATE_ARTICLE } from '../../providers/mssql/queries/article.js';
-import { CREATE as SQLITE_CREATE_ARTICLE } from '../../providers/sqlite3/queries/article.js';
+import {
+  CREATE as MSSQL_CREATE_ARTICLE,
+  CHECK_HAS_WAREHOUSE as MSSQL_CHECK_HAS_WAREHOUSE,
+} from '../../providers/mssql/queries/article.js';
+import {
+  CREATE as SQLITE_CREATE_ARTICLE,
+  CHECK_HAS_WAREHOUSE as SQLITE_CHECK_HAS_WAREHOUSE,
+} from '../../providers/sqlite3/queries/article.js';
 import { ADD as MSSQL_ADD_CATEGORYARTICLE } from '../../providers/mssql/queries/categoryarticle.js';
 import { ADD as SQLITE_ADD_CATEGORYARTICLE } from '../../providers/sqlite3/queries/categoryarticle.js';
 import { CREATE as MSSQL_CREATE_ARTICLETEXT } from '../../providers/mssql/queries/articletext.js';
@@ -20,6 +26,7 @@ export default function createUnderParent(provider) {
   const isSqlite = provider?.dialect === 'sqlite3';
 
   const createArticleSql = isSqlite ? SQLITE_CREATE_ARTICLE : MSSQL_CREATE_ARTICLE;
+  const checkHasWarehouseSql = isSqlite ? SQLITE_CHECK_HAS_WAREHOUSE : MSSQL_CHECK_HAS_WAREHOUSE;
   const addCategoryArticleSql = isSqlite ? SQLITE_ADD_CATEGORYARTICLE : MSSQL_ADD_CATEGORYARTICLE;
   const createArticleTextSql = isSqlite ? SQLITE_CREATE_ARTICLETEXT : MSSQL_CREATE_ARTICLETEXT;
 
@@ -33,7 +40,7 @@ export default function createUnderParent(provider) {
    * @param {string} input.name - The article name.
    * @param {string} [input.desc] - The article description text/HTML.
    * @param {string} [input.seo] - The article SEO text.
-   * @param {boolean|number} [input.track_stock=true] - Whether inventory stock is tracked.
+   * @param {boolean|number} [input.track_stock=false] - Whether inventory stock is tracked.
    * @param {object} [tx] - Optional transaction to run within.
    * @returns {Promise<{id: number, parentId: number, name: string, sku: string, track_stock: boolean}>} The created article.
    *
@@ -43,7 +50,7 @@ export default function createUnderParent(provider) {
    */
   return async ({ googleAuthId, parentId, name, desc, description, seo, track_stock, trackStock, sku: inputSku }, tx) => {
     const rawTrack = track_stock ?? trackStock;
-    const finalTrackStock = rawTrack == null ? 1 : (rawTrack ? 1 : 0);
+    const finalTrackStock = rawTrack == null ? 0 : (rawTrack ? 1 : 0);
 
     const runCreate = async (runner) => {
       const { companyId, languageId, companyuserId } = await access(
@@ -52,6 +59,13 @@ export default function createUnderParent(provider) {
         runner,
       );
 
+      if (finalTrackStock === 1) {
+        const whRes = await runner.query(checkHasWarehouseSql, { companyId });
+        if (!whRes.rows || whRes.rows.length === 0) {
+          throw new Error('At least one warehouse is required to enable stock tracking');
+        }
+      }
+
       const unitId = await ensureUnit(runner, languageId, companyId);
       const sku = (typeof inputSku === 'string' && inputSku.trim()) ? inputSku.trim() : await allocateSku(companyId, runner);
       const slug = await resolveSlug(runner, { companyId, languageId, name });
diff --git a/src/store/article/getBySku.js b/src/store/article/getBySku.js
index 493f688..6f9dc35 100644
--- a/src/store/article/getBySku.js
+++ b/src/store/article/getBySku.js
@@ -55,7 +55,7 @@ export default function getBySku(provider) {
         seo: a.seo ?? null,
         unitamount: a.unitamount,
         weight: a.weight,
-        track_stock: Boolean(a.track_stock ?? 1),
+        track_stock: Boolean(a.track_stock ?? 0),
         unit: {
           si: a.unitSi,
           basesi: a.unitBasesi,
diff --git a/src/store/article/importRows.js b/src/store/article/importRows.js
index 99f0fa6..a65389a 100644
--- a/src/store/article/importRows.js
+++ b/src/store/article/importRows.js
@@ -107,7 +107,7 @@ export default function importRows(provider) {
    * @param {number|string} [input.rows[].net] - The POS net price (accepts German decimals).
    * @param {number|string} [input.rows[].tax] - The tax rate in percent (e.g. `19`).
    * @param {Array<string>|string} [input.rows[].eans] - The EANs to set.
-   * @param {boolean|number} [input.rows[].track_stock=true] - Whether inventory stock is tracked.
+   * @param {boolean|number} [input.rows[].track_stock=false] - Whether inventory stock is tracked.
    * @param {string} [input.rows[].parentSku] - The parent article SKU for a V/K compound link.
    * @param {number|string} [input.rows[].deposit] - The deposit (Pfand) value; currently ignored.
    * @param {object} [tx] - Optional transaction.
@@ -174,7 +174,13 @@ export default function importRows(provider) {
           const slug = await resolveSlug(runner, { companyId, languageId, name });
 
           const rawTrack = row.track_stock ?? row.trackStock;
-          const trackStock = rawTrack == null ? 1 : (rawTrack ? 1 : 0);
+          const trackStock = rawTrack == null ? 0 : (rawTrack ? 1 : 0);
+          if (trackStock === 1) {
+            const whRes = await runner.query(articleQueries.CHECK_HAS_WAREHOUSE, { companyId });
+            if (!whRes.rows || whRes.rows.length === 0) {
+              throw new Error('At least one warehouse is required to enable stock tracking');
+            }
+          }
 
           const article = await runner.query(articleQueries.CREATE, {
             companyId,
diff --git a/src/store/article/listExport.js b/src/store/article/listExport.js
index dc5a448..c9a089c 100644
--- a/src/store/article/listExport.js
+++ b/src/store/article/listExport.js
@@ -94,7 +94,7 @@ export default function listExport(provider) {
       unitSi: row.unitSi,
       unitSymbol: row.unitSymbol,
       unitamount: row.unitamount,
-      track_stock: Boolean(row.track_stock ?? 1),
+      track_stock: Boolean(row.track_stock ?? 0),
       brandName: row.brandName,
       net: row.net,
       taxRate: row.taxRate,
diff --git a/src/store/article/queryBySku.js b/src/store/article/queryBySku.js
index 75a858a..192df13 100644
--- a/src/store/article/queryBySku.js
+++ b/src/store/article/queryBySku.js
@@ -10,7 +10,7 @@ function shapeArticleDetail(row, categoryIds, photos, eans, prices) {
     slug: row.slug,
     unitamount: row.unitamount,
     weight: row.weight,
-    track_stock: Boolean(row.track_stock ?? 1),
+    track_stock: Boolean(row.track_stock ?? 0),
     unit: {
       si: row.unitSi,
       basesi: row.unitBasesi,
diff --git a/src/store/article/setTrackStockBySku.js b/src/store/article/setTrackStockBySku.js
index 88fa6e5..09c70bb 100644
--- a/src/store/article/setTrackStockBySku.js
+++ b/src/store/article/setTrackStockBySku.js
@@ -1,5 +1,11 @@
-import { UPDATE_TRACK_STOCK as MSSQL_UPDATE_TRACK_STOCK } from '../../providers/mssql/queries/article.js';
-import { UPDATE_TRACK_STOCK as SQLITE_UPDATE_TRACK_STOCK } from '../../providers/sqlite3/queries/article.js';
+import {
+  UPDATE_TRACK_STOCK as MSSQL_UPDATE_TRACK_STOCK,
+  CHECK_HAS_WAREHOUSE as MSSQL_CHECK_HAS_WAREHOUSE,
+} from '../../providers/mssql/queries/article.js';
+import {
+  UPDATE_TRACK_STOCK as SQLITE_UPDATE_TRACK_STOCK,
+  CHECK_HAS_WAREHOUSE as SQLITE_CHECK_HAS_WAREHOUSE,
+} from '../../providers/sqlite3/queries/article.js';
 import queryBySku from './queryBySku.js';
 import resolveArticleBySku from './resolveArticleBySku.js';
 import { recordTrackStockChangeHistory } from '../articlehistory/record.js';
@@ -8,10 +14,9 @@ import makeRunner from '../runner.js';
 export default function setTrackStockBySku(provider) {
   const resolve = resolveArticleBySku(provider);
   const load = queryBySku(provider);
-  const sql =
-    provider?.dialect === 'sqlite3'
-      ? SQLITE_UPDATE_TRACK_STOCK
-      : MSSQL_UPDATE_TRACK_STOCK;
+  const isSqlite = provider?.dialect === 'sqlite3';
+  const sql = isSqlite ? SQLITE_UPDATE_TRACK_STOCK : MSSQL_UPDATE_TRACK_STOCK;
+  const checkHasWarehouseSql = isSqlite ? SQLITE_CHECK_HAS_WAREHOUSE : MSSQL_CHECK_HAS_WAREHOUSE;
 
   /**
    * Sets the track_stock flag of an article by its SKU.
@@ -21,7 +26,7 @@ export default function setTrackStockBySku(provider) {
    * @param {boolean|number} trackStock - Whether stock tracking is enabled.
    * @param {object} [tx] - Optional transaction.
    * @returns {Promise<object>} The updated article.
-   * @throws {Error} If trackStock is invalid or the article is not found.
+   * @throws {Error} If trackStock is invalid, article not found, or no warehouse exists when enabling.
    *
    * @example
    * const article = await store.article.setTrackStockBySku(42, 'SKU-1', true);
@@ -33,15 +38,22 @@ export default function setTrackStockBySku(provider) {
     }
 
     const runner = makeRunner(provider, tx);
-    const { articleId, languageId, companyuserId } = await resolve(googleAuthId, sku, runner);
+    const { articleId, languageId, companyId, companyuserId } = await resolve(googleAuthId, sku, runner);
+
+    const newTrack = Boolean(trackStock);
+    if (newTrack) {
+      const whRes = await runner.query(checkHasWarehouseSql, { companyId });
+      if (!whRes.rows || whRes.rows.length === 0) {
+        throw new Error('At least one warehouse is required to enable stock tracking');
+      }
+    }
 
     // Read old track_stock for history
     const oldRes = await runner.query(
       'SELECT track_stock FROM article WHERE id = @articleId',
       { articleId },
     );
-    const oldTrack = Boolean(oldRes.rows[0]?.track_stock ?? 1);
-    const newTrack = Boolean(trackStock);
+    const oldTrack = Boolean(oldRes.rows[0]?.track_stock ?? 0);
 
     const result = await runner.query(sql, {
       articleId,
diff --git a/src/store/article/updateBySku.js b/src/store/article/updateBySku.js
index 6319e2b..75662b7 100644
--- a/src/store/article/updateBySku.js
+++ b/src/store/article/updateBySku.js
@@ -98,6 +98,13 @@ export default function updateBySku(provider) {
         throw new Error('Article not found');
       }
 
+      if (hasTrackStock && Boolean(rawTrackStock)) {
+        const whRes = await runner.query(articleQueries.CHECK_HAS_WAREHOUSE, { companyId });
+        if (!whRes.rows || whRes.rows.length === 0) {
+          throw new Error('At least one warehouse is required to enable stock tracking');
+        }
+      }
+
       let unitId;
       let newUnitSymbol = current.unitSymbol ?? current.unitSi ?? '';
       if (hasUnitSi) {
@@ -139,7 +146,7 @@ export default function updateBySku(provider) {
         }
       }
       if (hasTrackStock) {
-        const oldTrack = Boolean(current.track_stock ?? 1);
+        const oldTrack = Boolean(current.track_stock ?? 0);
         const newTrack = Boolean(rawTrackStock);
         if (oldTrack !== newTrack) {
           historyLines.push(
diff --git a/src/store/category/queryCategoryArticles.js b/src/store/category/queryCategoryArticles.js
index dc0aff5..790d0d8 100644
--- a/src/store/category/queryCategoryArticles.js
+++ b/src/store/category/queryCategoryArticles.js
@@ -24,7 +24,7 @@ export default function queryCategoryArticles(provider) {
       } = row;
       return {
         ...rest,
-        track_stock: Boolean(rest.track_stock ?? 1),
+        track_stock: Boolean(rest.track_stock ?? 0),
         // MSSQL returns BIT as boolean, SQLite as 0/1 integer. Normalize so both
         // dialects expose isParent as a real boolean, matching article/getBySku.
         isParent: Boolean(rest.isParent),
diff --git a/src/store/warehouse/delete.js b/src/store/warehouse/delete.js
index e67a87f..f872cca 100644
--- a/src/store/warehouse/delete.js
+++ b/src/store/warehouse/delete.js
@@ -1,10 +1,14 @@
 import {
   DELETE_BY_COMPANY_AND_ID as MSSQL_DELETE,
   CHECK_LEDGER_USAGE as MSSQL_CHECK_USAGE,
+  COUNT_BY_COMPANY as MSSQL_COUNT,
+  CHECK_TRACK_STOCK_ARTICLES as MSSQL_CHECK_TRACK_STOCK,
 } from '../../providers/mssql/queries/warehouse.js';
 import {
   DELETE_BY_COMPANY_AND_ID as SQLITE_DELETE,
   CHECK_LEDGER_USAGE as SQLITE_CHECK_USAGE,
+  COUNT_BY_COMPANY as SQLITE_COUNT,
+  CHECK_TRACK_STOCK_ARTICLES as SQLITE_CHECK_TRACK_STOCK,
 } from '../../providers/sqlite3/queries/warehouse.js';
 import { isForeignKeyConstraintError } from '../../providers/provider.js';
 import resolveSelectedCompanyAccess from '../companyuser/resolveSelectedCompanyAccess.js';
@@ -15,15 +19,18 @@ export default function del(provider) {
   const isSqlite = provider?.dialect === 'sqlite3';
   const deleteSql = isSqlite ? SQLITE_DELETE : MSSQL_DELETE;
   const checkUsageSql = isSqlite ? SQLITE_CHECK_USAGE : MSSQL_CHECK_USAGE;
+  const countSql = isSqlite ? SQLITE_COUNT : MSSQL_COUNT;
+  const checkTrackStockSql = isSqlite ? SQLITE_CHECK_TRACK_STOCK : MSSQL_CHECK_TRACK_STOCK;
 
   /**
-   * Deletes a warehouse for the user's selected company, unless referenced in the ledger.
+   * Deletes a warehouse for the user's selected company, unless referenced in the ledger
+   * or it is the last warehouse while articles have stock tracking enabled.
    *
    * @param {number} googleAuthId - The id of the Google auth user.
    * @param {number} id - The warehouse ID to delete.
    * @param {object} [tx] - Optional transaction to run within.
    * @returns {Promise<void>}
-   * @throws {Error} If warehouse not found or is in use in the ledger.
+   * @throws {Error} If warehouse not found, in use in the ledger, or is the last warehouse with track_stock articles.
    *
    * @example
    * await store.warehouse.delete(googleAuthId, 1);
@@ -43,6 +50,16 @@ export default function del(provider) {
       throw new Error('Warehouse in use in ledger');
     }
 
+    // Cannot delete the last warehouse if there are articles with track_stock enabled
+    const countRes = await runner.query(countSql, { companyId });
+    const count = Number(countRes.rows[0]?.count ?? 0);
+    if (count <= 1) {
+      const trackRes = await runner.query(checkTrackStockSql, { companyId });
+      if (trackRes.rows && trackRes.rows.length > 0) {
+        throw new Error('Cannot delete the last warehouse while articles have stock tracking enabled');
+      }
+    }
+
     try {
       const result = await runner.query(deleteSql, {
         id: numericId,