A SKU mapping links a Shopify product variant to a Walmart WFS item. It tells the app: "when this Shopify variant needs to be fulfilled, use this Walmart item."

Without a mapping, the app cannot submit the order to Walmart. The order will enter an EXCEPTION status immediately.

How do I know which Walmart SKU to use?

Your Walmart item SKUs are visible in:

• Walmart Seller Center → Manage Items → select an item → the SKU field
• The Walmart Products tab in the app's Catalog page (after running a Walmart import)

The Walmart SKU is typically the same identifier you used when creating the item listing on Walmart Marketplace.

Why didn't auto-matching work for my products?

Auto-matching compares a field on your Shopify variant to a field on your Walmart item. The match is exact and case-sensitive for barcode matching, case-insensitive for SKU matching.

Common reasons matching fails:

• Different SKU formats: Shopify has WMT-SKU-123 but Walmart has WMTSKU123
• Missing Shopify SKU field: The Shopify variant has no SKU filled in
• Missing barcode: The Shopify variant has no barcode, and the strategy requires one
• Different barcodes: The Shopify barcode and Walmart UPC don't match (different edition, bundle, etc.)

Fix: Switch to a different matching strategy in Settings → Inventory & Catalog, re-run matching, or map the remaining products manually in Catalog → Unmatched.

Can I have multiple Shopify variants mapped to the same Walmart SKU?

Yes. If you have multiple Shopify variants that map to the same Walmart item (e.g. the same product sold in different bundles), you can create one mapping per variant, all pointing to the same Walmart SKU.

Can one Shopify variant map to multiple Walmart SKUs?

No. Each Shopify variant can only map to one Walmart SKU at a time. If you need to change the mapping, remove the existing one and add a new one.

What happens if I delete a SKU mapping?

The mapping is removed from both the SKU Mappings page and the Catalog (the product reappears in the Unmatched tab). This does not affect orders that are already in progress — active orders retain their Walmart order reference and continue to process normally.

What is the SKU mapping limit?

• Free plan: 100 SKU mappings
• Advanced plan: Unlimited

If you are on the Free plan and have reached 100 mappings, you will not be able to add new ones until you upgrade.

Do I need mappings for WFS orders (Walmart.com → Shopify)?

Yes. When a WFS order arrives from Walmart.com, the app uses the SKU mappings to link the Walmart item to the correct Shopify product variant when creating the Shopify order. Without a mapping, the WFS order cannot be associated with your Shopify products.