Overview

Error 90036 is one of the more common feed processing errors Amazon sellers encounter when creating or updating product listings. This error fires when a value you've submitted for a specific attribute doesn't match what Amazon expects — whether that's due to a wrong value, bad formatting, or prohibited characters. Understanding how to diagnose and fix this error quickly can save sellers significant time and prevent listing delays.

Key Points / What Sellers Need to Know

• Invalid attribute values trigger the error — Amazon validates every field in your product feed against a set of accepted values, and Error 90036 means one of your entries failed that check.
• Formatting and syntax matter — Even if you have the right value conceptually, incorrect capitalization, extra spaces, or special characters can cause the error to appear.
• Prohibited characters will be rejected — Certain symbols and characters are not allowed in specific attribute fields, and including them will block your listing submission.
• The fix is straightforward — Once you identify which attribute triggered the error and look up Amazon's accepted values, correcting the issue is usually a quick update.

Why This Error Occurs

Error 90036 is essentially Amazon's way of telling you that a particular field in your product listing contains data it cannot accept. There are two primary causes. First, the value you entered simply isn't on Amazon's list of valid options for that attribute. For example, if a field expects you to choose from a predefined dropdown of values like "Small," "Medium," or "Large," submitting "Med" or "M" would trigger this error. Second, the value may contain formatting problems such as incorrect syntax, unsupported special characters, or symbols that Amazon's system prohibits in that particular field.

How to Diagnose the Problem

When you encounter Error 90036, your first step should be to pull up the feed processing summary report. This report will highlight exactly which attribute triggered the error and show you the invalid value that was submitted. Make note of both the attribute name and the rejected value, as you'll need these details to look up the correct format. Next, open the valid values sheet that corresponds to your product category's feed template. Amazon provides these reference sheets for every category, and they list every acceptable value for each attribute. Compare what you submitted against what Amazon expects, paying close attention to exact spelling, formatting conventions, and any character restrictions.