Overview

Error 100545 is a product feed validation error that Amazon sellers encounter when an attribute value submitted in their listing feed conflicts with the data already stored in Amazon's catalog system. This error can prevent product listings from being created or updated, directly impacting a seller's ability to list and sell inventory. Understanding how to diagnose and resolve this error is essential for maintaining smooth catalog operations.

Key Points / What Sellers Need to Know

• Attribute Mismatch Trigger — This error fires when a value you submit for a specific product attribute does not match what Amazon's catalog already has on file for that item. The conflict is between your feed data and Amazon's validated catalog records.
• Commonly Affected Attributes — While any attribute can trigger this error, it frequently involves fields like brand name, item type, product type, size, color, or other attributes that Amazon considers authoritative once established.
• Feed Processing Report — The specific attribute causing the conflict is identified in your feed processing summary report, which you can download from the "Add Products via Upload" section in Seller Central.
• Catalog Authority — Amazon's catalog system treats certain attribute values as locked once they've been validated. Sellers cannot override these values through standard feed submissions.

How This Error Occurs

When you submit a product feed — whether through a flat file upload, the SP-API, or a third-party tool — Amazon's systems compare the attribute values in your submission against the existing catalog data. If any attribute you provide disagrees with what Amazon already has stored, the system rejects that specific update and returns error 100545. This can happen when you're creating a new offer on an existing ASIN or when attempting to update product details on a listing you already own. The error is Amazon's way of protecting catalog data integrity and preventing conflicting information from entering the system.

Steps to Resolve Error 100545

Start by downloading your feed processing summary report from Seller Central to identify exactly which attribute triggered the error. Once you know the problematic attribute, review your flat file or API submission to see what value you provided. Cross-reference this against Amazon's current catalog data for that ASIN, which you can view on the product detail page or through the "Manage All Inventory" interface. In many cases, the fix is straightforward: update your feed to match the value Amazon already has in its catalog. If you believe Amazon's catalog data is incorrect, you may need to open a case with Seller Support or submit a contribution through the product detail page to request a catalog correction.