Duplicate identical listing from same seller

eBay error 21919067 means you've submitted a listing identical to one that's already live under your seller account. eBay enforces a duplicate-listing policy and blocks the second one.

Common causes: a feed re-publish that didn't first end existing listings, two SKUs in the source PIM that resolve to the same product, or running the same product across two SKU variants without using a multi-quantity listing. eBay wants you to use multi-quantity instead of duplicates.

1. Search Seller Hub for an existing listing of the same product.
2. Either end the duplicate or convert both to a single multi-quantity listing.
3. Use item_group_id (variations) for size/color rather than separate listings.
4. Add idempotency tracking to your feed pipeline so re-runs don't create duplicates.
5. Resubmit once the duplicate is removed.

• Re-running the same feed twice in one day expecting eBay to upsert
• Listing the same product from two warehouses as separate inventories