Why aren’t my inventory updates reflecting on Shopify when using multiple columns to build a SKU?

If your inventory updates are not appearing in Shopify, ensure that your product identifier mapping in Stock Sync matches exactly how your Shopify variant SKUs are structured. When SKUs are built from multiple fields (such as ItemNumber + Color + Size), you must map each component under the correct identifier fields in Stock Sync.

For example, if your SKU in Shopify is generated like 4637-994 or includes Size as well, map:

• SKU or Option fields → the exact columns used to build your variant SKU (e.g., ItemNumber, Color, Size)

Stock Sync will then combine these fields to correctly match the Shopify variant. If the SKU cannot be matched, the quantity or price will not update in Shopify. Additionally, if your file contains text values such as “auf Lager” or “Nicht auf Lager,” set up quantity rules to convert them into numeric stock levels.

Correct SKU mapping and quantity rules are essential for updates to reflect successfully.

Updated on: 14/07/2026