Overview

Error 90218 is a product listing validation error that Amazon sellers may encounter when creating or updating listings in Seller Central. This error occurs when a value submitted for a specific product attribute exceeds the maximum threshold that Amazon permits for that field. Understanding this error and how to resolve it is essential for sellers who need to get their listings live quickly.

Key Points / What Sellers Need to Know

• Validation-based error — Error 90218 is triggered during the listing submission process when Amazon's system detects that a value you entered for a particular attribute is higher than the allowed maximum.
• Attribute-specific — The error message will identify the exact attribute name and the maximum value permitted, making it straightforward to pinpoint the issue.
• Applies to numeric fields — This error typically affects numeric attributes such as weight, dimensions, quantity, price-related fields, or character counts in text fields.
• Blocks listing creation or updates — Until the offending value is corrected, the listing cannot be successfully submitted or modified.
• Common in bulk uploads — Sellers using flat files or inventory feeds are particularly susceptible to this error due to data formatting issues or unit mismatches.

How This Error Works

When you submit product data to Amazon — whether through Seller Central's Add a Product tool, flat file uploads, or API-based integrations — each attribute undergoes validation against Amazon's predefined rules. For many numeric and text-based fields, Amazon sets maximum allowable values to maintain data quality across the catalog. Error 90218 fires when your submitted value for a given attribute surpasses that ceiling. The error message follows the pattern: "Value for '{attribute_name}' cannot be changed to a value which is greater than {value}," where the placeholders are replaced with the specific attribute and its limit. This makes diagnosing the problem relatively straightforward once you know where to look.

Common Causes and How to Fix Them

The most frequent cause of Error 90218 is a unit mismatch. For example, entering a product weight in grams when Amazon expects the value in pounds, or submitting dimensions in millimeters when the field expects inches. This can result in values that appear unreasonably large to Amazon's validation system. Another common cause is data entry errors, such as accidentally adding extra digits to a numeric field. Sellers using bulk upload templates should double-check that their spreadsheet columns align with the expected units and formats specified in Amazon's category-specific flat file templates. To resolve the error, identify the attribute named in the error message, verify the correct unit of measurement and maximum value allowed, and resubmit with a corrected value that falls within the acceptable range.