Error 90107 — Duplicate SKU in feed submission

The same SKU appears multiple times in your feed file. Amazon processes feeds row-by-row and rejects duplicates to prevent inventory/pricing inconsistencies.

Feed export tools sometimes output the same SKU multiple times when products belong to multiple collections, or when a feed re-export includes both old + new rows.

1. De-duplicate your feed in Excel/Sheets: Data → Remove Duplicates on the SKU column.
2. If your platform exports the same product multiple times by category, use a SKU-collapsing pre-processor before submitting to Amazon.
3. Resubmit.

• Multi-category platforms exporting one product per category
• Append vs overwrite logic in your data pipeline