Overview

Error 90008 is a common file upload error in Amazon Seller Central that occurs when the header row in your inventory or listing file is missing, corrupted, or has been accidentally modified. Understanding how to resolve this error quickly can prevent delays in getting your product listings live or updated.

Key Points / What Sellers Need to Know

• Header row is required — Every file you upload to Seller Central must include a specific header row that Amazon uses to process your data correctly.
• Do not modify the header — The header row is generated by Amazon for internal processing purposes and should never be edited, rearranged, or deleted.
• Template files include correct headers — Downloading a fresh template from Seller Central is the fastest way to ensure your header row is properly formatted.
• This error blocks your entire feed — Until the header issue is resolved, Amazon cannot process any of the data in your uploaded file.

What Causes Error 90008

This error is triggered when Amazon's system detects that the header row in your uploaded file is either missing entirely or contains invalid data. The most common causes include accidentally deleting or overwriting the header row while editing your spreadsheet, copying product data into a blank file without including the required header information, or using an outdated template that no longer matches Amazon's current file format requirements. Sellers who frequently edit their inventory files in spreadsheet applications like Excel or Google Sheets are particularly prone to this issue, as auto-formatting features can sometimes alter the header content without the seller realizing it.

How to Fix the Error

There are two straightforward approaches to resolving Error 90008. The first and recommended method is to download a fresh copy of the inventory file template directly from Seller Central. Navigate to the inventory upload section, select the appropriate template for your product category, and transfer your product data into the new file. This guarantees that the header row is correctly formatted. The second option is to manually correct the header row in your existing file by inserting the proper header data directly above the column headings. However, this approach requires you to know the exact format Amazon expects, so downloading a new template is generally the safer choice.