id identifier Fix “Duplicate listing detected” on Amazon
Amazon detected another listing for the same product (matching GTIN, brand, and key attributes). Amazon's catalog policy is one ASIN per product — duplicates are merged or suppressed.
What you see in Amazon:
Duplicate listing detected Amazon's one-ASIN-per-product policy is strict. Duplicate listings get merged or suppressed.
Use existing ASIN if one exists for the product. For your brand-owned products listed by competitors, claim through Brand Registry.
Top causes
- 1
Same product listed by multiple sellers — Amazon merges to one ASIN
- 2
Variant items not properly grouped, appearing as duplicate listings
- 3
Reseller creating new listing when existing ASIN already covers the product
How to fix it
- 1
Use the existing ASIN if one exists
Search for the GTIN in Seller Central. If a listing exists, add your offer to it rather than creating a new listing.
- 2
Group variants correctly
Sizes/colours of the same product share a parent SKU. Don't list each as a separate ASIN.
- 3
Appeal if you're the brand owner
If another seller created an ASIN for your brand-owned product, you can claim it through Brand Registry.
Related issues
Duplicate ID
Two or more rows in the feed share the same id. Google can only accept one item per id — the others are silently dropped, leading to inventory gaps you'd otherwise miss.
Read moreDuplicate listing
TikTok detected an item that's very similar to another listing in your catalog or another seller's catalog. Can suppress delivery on both items pending review.
Read moreRelated fields
FAQ
Can I have multiple ASINs for the same product?
No. Amazon's one-ASIN-per-product policy is strict. The exception is genuinely different SKUs (different bundle compositions, different pack sizes) that warrant separate ASINs.
Last reviewed: 26 May 2026
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