Error 8004 — Potential duplicate match

Amazon detected your product may match an existing ASIN by attributes (title, brand, dimensions, identifier). Submission held for review.

Amazon's matching algorithm sees similarity to an existing catalog entry. Either you should list against the existing ASIN, or your product is genuinely different and needs disambiguation.

1. Search Amazon for similar products. If a match exists, list against that ASIN instead.
2. If your product is genuinely different, ensure brand, model, identifier, and key attributes clearly distinguish it.
3. Resubmit with disambiguating attributes.
4. Sometimes Amazon merges automatically — wait 24 hours and check.

• Creating duplicate ASINs of products already on Amazon hurts everyone's listings