Overview

Amazon Seller Central returns error 99010 when a bulk upload file lacks data in one or more columns that the platform deems mandatory for the selected product category. The issue appears at the moment sellers submit a flat‑file or inventory template, and it stops the file from being processed. Fixing the error promptly is essential for sellers who rely on batch uploads to launch new items, refresh listings, or run time‑sensitive promotions.

Key Points

• Root cause — The system flags error 99010 whenever a required field such as “Product Title,” “Brand,” or a category‑specific attribute is left blank or contains a null value in the uploaded spreadsheet.
• Typical scenarios — The error shows up during bulk listing uploads, inventory file submissions, or any template‑driven product update performed through Seller Central.
• Built‑in diagnostics — Amazon highlights each empty mandatory cell in orange on the “Data Definitions” sheet, allowing sellers to pinpoint the exact columns that need attention.
• Manual correction required — Sellers must open the original file, fill every highlighted required field with valid data, and re‑upload the corrected version; there is no automated fix button.
• Common triggers — Copy‑pasting between templates, switching product categories without updating the template, or using an outdated version of the category file often leads to missing mandatory values.
• Impact on timelines — Each rejected upload adds at least 30 minutes of troubleshooting time and can delay product launches, especially during peak seasons or flash‑sale windows.

How the Error Occurs

1. File submission — The seller uploads a flat file (e.g., a CSV or XLSX) via the “Add Products via Upload” tool in Seller Central.
2. System validation — Amazon’s backend cross‑checks every row against the mandatory attribute list for the chosen product type, such as “Electronics > Headphones.”
3. Missing data detection — If any required column contains an empty string, null, or placeholder like “N/A,” the validation engine rejects the file and returns error 99010, citing the specific attribute group (e.g., “Item Type” or “Manufacturer”).