/**
 * Schema 2 → 1 (MSSQL): drops posterminal `sort`, `enabled`, `clientversion`.
 * @param {{ query: (sql: string, params?: object) => Promise<unknown>, assertVersion: (v: number) => Promise<void>, setVersion: (v: number) => Promise<void> }} ctx
 */
export default async function downgrade({ query, assertVersion, setVersion }) {
  await assertVersion(2);

  await query(`
    ALTER TABLE posterminal DROP CONSTRAINT DF_posterminal_sort, DF_posterminal_enabled;
    ALTER TABLE posterminal DROP COLUMN sort, enabled, clientversion;
  `);

  await setVersion(1);
}