Error 90011

The \"{0}\" column is duplicated in the file. To correct this error, download the template again and use that new copy, or remove the duplicate column from your existing file.

(Fatal) Your input file has invalid or empty column headings. Do one of the following and then resubmit your feed:

• Insert the correct column heading as row two in your existing file.
• Go to Seller Help and download a new copy of the template to use.