Overview

Error 90055 is one of the most common feed processing errors Amazon sellers encounter when uploading inventory files through Seller Central. This error occurs when a value submitted in your flat file template does not match any of the accepted options for that particular field. Understanding how to diagnose and resolve this error can save sellers significant time and prevent listing delays.

Key Points / What Sellers Need to Know

• Invalid field value detected — Error 90055 triggers when your inventory file contains a value in a specific column that Amazon's system does not recognize as valid for that data field.
• Amazon replaces bad values with blanks — When the system encounters an invalid entry, it automatically substitutes an empty value, which can cause listings to appear incomplete or fail to publish correctly.
• Template definitions are your guide — Every flat file template includes "Valid Values" and "Data Definitions" tabs that specify exactly which entries are accepted for each field.
• Resubmission required after correction — Simply fixing the value in Seller Central may not be sufficient; you typically need to correct the source file and resubmit the entire feed.

What Causes Error 90055

This error most commonly appears when sellers manually enter data into flat file templates without consulting the valid values reference sheets. For example, a seller might type "New" in a condition field when the template expects "new_new," or enter a free-text brand name in a field that requires selection from a pre-approved list. The error can also occur when copying data from external spreadsheets or inventory management systems that use different formatting conventions than Amazon requires. Sellers who work across multiple Amazon marketplaces may encounter this error when templates from one region use different valid values than another, since field requirements can vary by marketplace.

How to Fix the Error

The correction process begins with identifying which specific field triggered the error. Download your processing report from the inventory file upload page in Seller Central, where the error message will reference the problematic value and the column where it appeared. Next, open the inventory file template you used and navigate to the "Valid Values" or "Data Definitions" tab to find the list of accepted entries for that field. Replace the rejected value with one of the approved options, making sure to match the exact formatting including capitalization and special characters. Once corrected, save the file and resubmit your feed through Seller Central. It is advisable to process a small test batch first to confirm the fix before uploading your full inventory file.