How to sync inventory with duplicate SKUs?

Yes, you can sync by enabling this option, which updates duplicate SKUs with the same product identifier.

By default, if multiple products share the same SKU or identifier, only the first matching product will be updated. Enabling the duplicate-update option ensures all matching products are updated.

The same rule applies when matching by barcode: if multiple products share a barcode, enable duplicate updates to apply an external feed update to every matching product. However, duplicate SKUs or barcodes can cause conflicting or unexpected inventory results, so use a product identifier that is unique and consistent across stores whenever possible. If a SKU does not match across stores—for example, because of leading zeros—barcode matching may work better, provided each barcode identifies only one product.

Stock Sync does not synchronize inventory between duplicate products inside the same Shopify store when one of them sells. It only applies feed updates from an external source, such as a file, Google Sheet, supplier, or another Shopify store. For order-based inventory sharing between identical SKUs, use Shopify or a dedicated inventory-management app.

If your store contains duplicate identifiers across different products, review and merge duplicate product entries or assign unique SKUs or barcodes to prevent skipped updates, missing data, or incorrect quantities. Before applying a live update, run a preview synchronization and verify the affected products.

You can find these options from Matching Column (Step 2) > Product Identifier field > Update duplicate products with the same product identifier.

Updated on: 25/08/2026