Duplicate variation label or specific

Error 21916585 means the listing contains two variations with the same name-value pair (e.g., two rows of Size=Medium / Color=Blue). eBay needs every variation to be unique.

Variant feeds joined twice without de-duplication, or a custom variation label was reused across two SKUs. eBay treats the variation specifics combination as a unique key per listing.

1. Group variations by their full specific set and check for duplicates.
2. Merge or remove duplicates so each name-value combination appears once.
3. If two SKUs genuinely share specifics, distinguish them with an additional axis or merge them in the PIM.
4. Validate uniqueness before exporting to eBay.
5. Resubmit once duplicates are resolved.

• Including the same Size/Color twice with different prices to A/B test
• Joining child variants twice during a feed migration