Overview

Error 90062 is a feed processing error that Amazon sellers may encounter when uploading product data through inventory files or feeds. This error occurs when two columns in a feed share the same underlying attribute, causing a conflict where one column's values are automatically discarded. Understanding how to identify and fix this issue can save sellers time and prevent unexpected data loss in their product listings.

Key Points / What Sellers Need to Know

• Conflicting columns cause data loss - When two columns in your feed map to the same product attribute, Amazon will silently ignore the values in one of them, which can lead to missing or incorrect listing information.
• Only one value per attribute is accepted - Amazon's feed processing system cannot accept two different values for the same underlying attribute, so it enforces a strict one-value rule.
• The first conflicting column is typically ignored - In most cases, when column A conflicts with column B, the values you entered in column A will be the ones discarded.
• Resubmission is required after correction - Simply identifying the conflict is not enough; you must edit your feed file to remove the duplicate data and upload it again.

How This Error Occurs

Error 90062 is triggered during feed processing when Amazon's system detects that two separate columns in your uploaded file are both trying to set the same product attribute. This commonly happens when sellers use flat file templates that contain multiple column headers mapping to identical backend attributes, or when custom column names inadvertently overlap with standard Amazon field names. For example, a template might include both a generic description field and a category-specific description field that ultimately write to the same attribute. When the system encounters this duplication, it resolves the conflict by ignoring one set of values entirely, which means the data you intended to upload may not appear on your listing.

How to Fix the Issue

To resolve Error 90062, start by examining your feed file to identify which two columns are in conflict. The error message itself will reference the specific column names involved, so look for the column names indicated in the error output. Once you have identified the conflicting pair, decide which column contains the correct data you want Amazon to use. Remove the values from the other column entirely, or delete the redundant column from your file if it is not required. After making these corrections, save your file and resubmit the feed through Seller Central. It is good practice to download a fresh copy of the relevant flat file template from Amazon to ensure you are working with the most current column structure and avoid future conflicts.