This may happen if Amazon has flagged the ASIN or has restricted certain listings to specific sellers, causing it to appear as a generic or standalone product rather than linking to the established listing. To resolve this, double-check that you’re entering the ASIN and product details exactly as they appear in the original listing. You might also try contacting Seller Support to clarify any listing restrictions or issues specific to that ASIN on the second account, as they may need to manually link it to the correct listing.