Either fix an incorrect product ID, or create a new ASIN.
Check character requirements for your product ID. For example, UPCs have 12 digits, EANs have 13 digits and ISBNs have 10.
Check for conformity with industry standards using an online resource like a UPC validation tool.
If you need to fix an incorrect product ID, update your data and resubmit.
If your product ID is correct and it is new to the Amazon catalogue, you will need to create a new ASIN. Fill out the required fields in your inventory template and resubmit.
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