You need to send “CUSTOM” for the product_id and “GTIN” for the product_id_type to Walmart if you have product id exemption from Walmart.
You can easily use this feature with SA with a bulk file or from UI.
Via Bulk Action:
1- Go to your Walmart channel, select the related products and go to “Export>Export Overrides>Custom Overrides”
2- Select the “Product Id” and “Product Id Type” fields from the Identity tab and click the export.
3- Download the exported file from the “Notifications” from the top right.
These are the fields on the file.
You need to enter “CUSTOM” for the product_id and “GTIN” for the product_id_type headers in order to use this feature.
You can delete the actual_asin, original_name and original_product_id headers before uploading the file into the SA.
4- Upload the file back into the SA from the top right after the adjustments.
1- Select the related products and click “Edit(beta)>Channel Overrides”.
2- Select the fields from the Identity tab and click Open Bulk Editor.
3- Enter “CUSTOM” for the product id and “GTIN” for the id type and save it.
4-Include your items to channel.
5-Sync the Walmart channel