diff --git a/src/api/routes/article.js b/src/api/routes/article.js
index dfe04cf..8900406 100644
--- a/src/api/routes/article.js
+++ b/src/api/routes/article.js
@@ -62,6 +62,7 @@ function articleErrorStatus(error) {
     if (error.message === 'Brand not found') return 404;
     if (error.message === 'Invalid weight') return 400;
     if (error.message === 'Invalid categoryIds') return 400;
+    if (error.message?.includes('already exists') || error.code === 'SQLITE_CONSTRAINT_UNIQUE') return 409;
     return 500;
 }
 
@@ -132,6 +133,12 @@ export function register(app, basePath = '') {
      *           application/json:
      *             schema:
      *               $ref: '#/components/schemas/Error'
+     *       409:
+     *         description: SKU already exists
+     *         content:
+     *           application/json:
+     *             schema:
+     *               $ref: '#/components/schemas/Error'
      */
     app.post(`${basePath}/article`, async (req, res) => {
         const parent = parsePositiveInt(req.body?.parentId, 'parentId');