Overview

Error 5010 is a feed processing error that Amazon Seller Central returns when an XML feed submission contains more duplicate instances of a particular field than the system expects. This error typically surfaces during product listing uploads, inventory updates, or other bulk operations that rely on XML-formatted data feeds. Understanding how to identify and resolve this error is essential for sellers who manage their catalogs programmatically or through third-party tools.

Key Points / What Sellers Need to Know

• Root Cause — Error 5010 is triggered when a single message within your XML feed includes repeated instances of a field that should appear only once or a limited number of times.
• Where It Appears — This error shows up in your feed processing reports, which you can access through Seller Central's feed submission history or via the Selling Partner API (SP-API).
• Scope of Impact — The error applies to the specific message (individual product record) within your feed that contains the duplication, not necessarily the entire feed submission.
• Common Culprits — Fields like product identifiers, titles, descriptions, bullet points, and item-specific attributes are frequent sources of accidental duplication.

How This Error Occurs

When you submit product data to Amazon via XML feeds, each message in the feed represents a single product or action. Amazon's feed processor validates the XML structure against its schema definitions, which specify how many times each field can appear within a given message. Error 5010 fires when the processor encounters more instances of a field than the schema allows. For example, if your XML includes two Title elements for a single product when only one is permitted, the processor will reject that message with this error. This can happen due to software bugs in listing tools, copy-paste mistakes during manual XML editing, or template misconfigurations in feed generation scripts.

How to Fix Error 5010

Resolving this error requires inspecting the specific message flagged in your feed processing report and identifying which field has been duplicated. Start by downloading your feed processing report from Seller Central under the "Monitor Upload Status" section, or retrieve it via the SP-API Feeds endpoint. The report will indicate which message triggered the error. Open your XML feed file and locate that message by its sequence number or SKU. Review every field within that message and look for any element that appears more times than it should. Remove the extra duplicate entries so that each field conforms to Amazon's schema requirements. After making corrections, resubmit the feed and monitor the processing report to confirm the error has been resolved.