Overview

Amazon Seller Central throws error 5008 when a feed contains an operation field that does not match any of the values Amazon recognizes. The issue appears across flat‑file inventory uploads, generic XML data feeds, and XML listings feeds, and it stops the feed from being processed. Sellers must correct the invalid entry quickly to keep inventory and listing updates flowing without interruption.

Key Points

• Root cause — The error is triggered by an unsupported value placed in the operation‑type column or element of any feed submission.
• Flat‑file inventory — The “update‑delete” column accepts only “Update” or “Delete”; any other entry (e.g., “Remove”) generates error 5008 instantly.
• Generic XML data feed — The <Type> tag inside the XML envelope must be either “Update” or “Delete”; a misspelled or extra value causes the whole feed to be rejected.
• XML listings feed — This format permits three exact operation values—“Create”, “Update”, and “Delete”. Supplying anything else (such as “Add”) results in the same error.
• Resolution path — Identify the offending value, replace it with one of the accepted options, validate the file against Amazon’s schema, and resubmit the feed.

How the Error Occurs

1. Flat‑file inventory upload — When sellers fill out the inventory template, the “update‑delete” column signals whether a SKU should be added/modified or removed. If a row contains “Remove” instead of the required “Delete”, Amazon’s parser stops processing and returns error 5008.
2. Generic XML data feed — The feed’s envelope includes a <Type> element that tells Amazon the intended operation. Using a value like “Modify” rather than the allowed “Update” or “Delete” makes the system reject the entire XML payload with error 5008.
3. XML listings feed — Each <Message> block carries an <OperationType> (or similar) element. Acceptable entries are “Create”, “Update”, and “Delete”. Providing “Add” or leaving the element blank triggers the same unsupported‑operation response.