Overview

When sellers try to edit, update, or add offers to certain generic ASINs, Amazon may return error 100334. The error signals that the ASIN is flagged as “restricted generic,” meaning Amazon blocks any further contributions. Sellers must understand the restriction because it forces them to create a brand‑new ASIN rather than modify the existing page, directly affecting listing speed and sales continuity.

Key Points

• Restricted generic ASINs are locked for edits — Attempting to change attributes, upload new images, or add an offer to a locked ASIN triggers error 100334; for example, a seller who tried to update the weight field on ASIN B0EXAMPLE received the error instantly.
• New ASIN creation is the only workaround — Amazon’s system redirects the seller to the “Add a Product” workflow; a seller who abandoned the restricted page and opened a fresh listing was able to list the product without further blocks.
• Variation and marketplace extensions are blocked — When a seller attempted to link a restricted generic ASIN to a color‑size variation family, the system rejected the request with error 100334, preventing the variation from being saved.
• Flat‑file uploads can surface the error — Inventory feeds that include a restricted ASIN will list error 100334 in the processing report, allowing the seller to pinpoint the exact SKU that caused the failure.
• Catalog quality is the underlying reason — Amazon designates generic listings that have historically suffered from inaccurate or conflicting data as restricted, aiming to preserve buyer trust across the marketplace.
• The error appears across all Amazon stores — Whether the seller is operating in the U.S., EU, or JP marketplace, the same error code is returned, indicating a global restriction on that particular ASIN.

How Error 100334 Works

1. Seller initiates a change — The seller clicks “Edit” on a product detail page or uploads a feed that references a generic ASIN; for instance, uploading a CSV that includes ASIN B0EXAMPLE for price updates.
2. — The platform cross‑references the ASIN against its restricted‑generic list; if the ASIN appears on that list, the system flags the request as prohibited.