Overview

Error 90233 is a listing validation error that Amazon triggers when a seller attempts to update a product attribute in a way that reduces its value beyond an allowed threshold. The error message reads: "Value for '{attribute_name}' must not decrease by {limit}% or more." This safeguard exists to protect listing integrity and prevent accidental or harmful modifications to key product data fields.

Key Points / What Sellers Need to Know

• Threshold-Based Restriction — Amazon enforces percentage-based limits on how much certain attribute values can be reduced in a single update. If your change exceeds the allowed decrease percentage, the update will be rejected with Error 90233.
• Applies to Numerical Attributes — This error most commonly affects numerical fields such as price, item weight, package dimensions, or quantity-related attributes where a large downward change could indicate a data entry mistake.
• Protective Measure — The restriction is designed to prevent listing hijacking, accidental errors, and catalog data corruption. Amazon treats sudden large decreases in certain values as potentially suspicious activity.
• Attribute-Specific Limits — The exact percentage threshold varies by attribute. Some fields may allow a decrease of up to 50%, while others may have tighter restrictions depending on the product category and attribute type.
• Feed and API Submissions Affected — This error can appear whether you are updating listings manually through Seller Central, via flat file uploads, or through the SP-API and MWS feed submissions.

When This Error Occurs

Error 90233 is triggered during listing update submissions when Amazon's validation system detects that a new value for a specific attribute represents a decrease that exceeds the configured percentage limit. For example, if a product's weight is listed as 10 pounds and a seller submits an update changing it to 2 pounds, the 80% decrease would likely exceed the allowed threshold. The same logic applies to dimensions, price fields, and other numerical product attributes. This validation runs automatically as part of Amazon's catalog quality checks and cannot be bypassed through repeated submissions of the same value.