Overview

Error 99009 is a feed processing error that Amazon Seller Central returns when your product listing feed contains conflicting values across two or more columns. This error prevents the affected listings from being created or updated until the data inconsistencies are resolved. Understanding what triggers this error and how to fix it can save sellers significant time when managing inventory uploads.

Key Points / What Sellers Need to Know

• Conflicting column values — Error 99009 occurs when two or more fields in your feed file contain values that contradict each other, making it impossible for Amazon's system to process the listing correctly.
• Feed rejection is per-record — The error typically affects individual rows in your feed rather than the entire file, so some listings may process successfully while others fail.
• Data validation is required — Before resubmitting, you must review the flagged rows and ensure all column values are logically consistent with one another.
• Common in bulk uploads — This error most frequently appears when sellers use flat file templates or automated feed tools to upload or update large numbers of listings at once.

What Causes Error 99009

This error is triggered when Amazon's feed processing system detects that values in two or more columns within the same row of your upload file are incompatible. For example, if you specify a product type in one column but then provide attributes in other columns that do not apply to that product type, the system flags the conflict. Similarly, setting a fulfillment channel to FBA while simultaneously providing merchant-fulfilled shipping attributes can cause this error. The conflict may also arise from mismatched category-specific fields, such as specifying a clothing size type that does not align with the selected department or size system. In some cases, copy-paste errors or auto-fill mistakes in spreadsheet software introduce these inconsistencies without the seller realizing it.

How to Fix It

To resolve Error 99009, start by downloading your feed processing report from Seller Central, which will identify the specific rows and columns where conflicts were detected. Open your original feed file and locate each flagged row. Compare the values across all columns in that row to identify which fields are contradicting each other. Cross-reference the values against Amazon's category-specific flat file template to confirm which combinations are valid. Once you have corrected the conflicting values so that every field in each row is logically consistent, save the file and resubmit your feed. It is good practice to upload a small test batch first to confirm the fixes before resubmitting the entire file.