Overview

Sellers encounter error 8103 when a feed contains a product‑type value that Amazon does not recognize. The issue appears during the feed‑processing stage and blocks the affected SKUs from going live. Fixing the error quickly is essential to keep inventory listings active and sales flowing.

Key Points

• Invalid product‑type string — The error fires when the submitted value does not exist in Amazon’s current product‑type catalog.
• Exact formatting required — Capital letters, underscores, and no spaces are mandatory; “HOME_FURNITURE” is accepted, but “home furniture” is not.
• Marketplace‑specific types — Some product types are only valid in certain regions; a type that works in .com may be rejected in .ca.
• No free‑form entry — Amazon advises pulling the value directly from the drop‑down list or flat‑file template rather than typing it manually.
• Deprecation risk — Product types that were valid in older catalogs may have been retired, causing legacy feeds to fail.
• Impact on bulk uploads — Each rejected line adds to processing time, especially for sellers uploading thousands of SKUs at once.

How to Fix Error 8103

1. Locate the offending SKU — Open the feed processing summary, find the row that lists “Invalid product type” and note the exact string Amazon rejected (e.g., “office‑products”).
2. Access the official catalog — In Seller Central, go to Catalog → Add Products and click Product Type Catalog; use the search bar to locate the correct entry for the product’s category.
3. Select the approved value — Choose the product‑type directly from the list, such as OFFICE_PRODUCTS, and copy it without alteration.
4. Update the feed file — Replace the incorrect string in the original spreadsheet or XML file with the copied value, ensuring the cell retains the exact uppercase and underscore format.