When you set up your items on Walmart Marketplace, each item’s product identifier is associated with a single SKU ID. In this guide, you’ll learn how to update the SKU IDs for several items at once using the full item setup spreadsheet.Â
You must select the Add items button to download and complete all the attribute requirements in the template to update your SKUs. 
Update SKU IDs
Step 1 — Get started
Navigate to your Catalog  in Seller Center and select the Add items button. Select the Upload in bulk link located under Add thousands of items using a spreadsheet. On the next page, navigate to the New items section and select the Bulk spreadsheet button.  Select Seller fulfillment as the preferred fulfillment type, then choose Next.
You can’t change SKUs for items fulfilled through Walmart Fulfillment Services (WFS). They’re unique to the items and can't be replaced or reused. This avoids confusion and item mix-ups at fulfillment centers. Â
Step 2 — Build spreadsheetÂ
Select browse product type categories to search product types of item SKU IDs you want to update, then choose Next. Choose up to 10 product types and select Next. Finally, review the summary and select the Build spreadsheet button to download the spreadsheet. 
In the template, update your SKU IDs and complete the required fields and item attributes, including the column labeled SKU Update in the template’s  Optional section. You must choose Yes  from the dropdown menu for the SKUs to successfully update.
Step 3 — Upload the completed template
To upload your completed spreadsheet, return to the same window and select the Upload spreadsheet button. If the previous window closed, navigate to your Catalog and select  Add items. Then, choose the Upload in bulk link located under Add thousands of items using a spreadsheet.
Drag and drop your file onto the browser window under Upload or select the browse link to locate the file on your computer.  Select Next to upload the spreadsheet. Updates can appear as quickly as 15 minutes or can take up to four hours.
