fixing

src/controllers/pharmacy/factory_to_supplier.ts

@@ -190,6 +190,13 @@ export class FactorytoSupplierController {
             const factoryRepo = OrmHelper.DB.getRepository(Factory);
             const supplierRepo = OrmHelper.DB.getRepository(Supplier);
 
+            await factoryToSupplierRepo
+                .createQueryBuilder()
+                .delete()
+                .from(FactoryToSupplier)
+                .where("supplier_id = :supplierId", { supplierId: param.supplier_id })
+                .execute();
+
             let relation : FactoryToSupplier;
             for (const factoryId of param.factory_ids) {
                 relation = new FactoryToSupplier();