The issue arises from using a SKU that is already associated with another product in your listing. As a result, Amazon’s catalog displays outdated information for the corresponding ASIN, triggering an error. To address this, you can attempt to update the information through methods such as using “Flat file/Inventory File”, emphasizing the absence of a duplicated SKU. If the backend information fails to update, you will need to modify the SKU of your product and submit your inventory with the new SKU.
