Overview

Amazon returns error 8029 when a seller’s bulk upload or API call tries to change a product attribute that Amazon has locked for internal use only. The restriction applies to fields tied to safety, compliance, or classification, and the error stops only the prohibited update while allowing the rest of the feed to process. Sellers who rely on large‑scale listing management must recognize the error to keep their upload cycles running smoothly.

Key Points

• Write‑protected fields are off‑limits — Amazon reserves certain data columns for its own teams, so any attempt by a third‑party seller to edit them triggers a rejection.
• Typical protected attributes include safety flags — Examples such as the “is_adult_product” indicator and the “hazmat” classification are managed exclusively by Amazon and cannot be altered via seller feeds.
• Error appears during feed validation — When a submitted file contains a change to a locked attribute, Amazon’s processing engine flags the line with error 8029 and skips that specific column.
• Resolution is to strip the column — Removing the offending attribute from the feed and resubmitting eliminates the error; the remaining data continues to update normally.
• Incorrect protected data requires a support case — Sellers cannot correct a wrong hazmat or adult‑product flag themselves; they must open a ticket with Amazon Seller Support for a manual review.

How Error 8029 Works

1. Feed ingestion and permission check — Amazon reads each row of a flat‑file, inventory feed, or API payload and compares every column against an internal list of write‑protected attributes. Example: A seller uploads a CSV that includes the column “is_adult_product” for ASIN B07ABC123, even though the seller does not have edit rights.
2. Detection of a prohibited update — If the system finds a value change in a protected field, it isolates that change, logs error 8029, and marks the row as partially failed. Example: The feed tries to set “hazmat” = “yes” for a non‑hazardous item; Amazon blocks only that column while accepting price and inventory updates.