3718188 - Error: Required data is missing for [Field Name] - Mapping customized file headers

I am attempting to perform a data upload, but the transaction fails with a "Required data is missing" error for a specific field. Although I have confirmed that the necessary data is present in my upload file, the error persists. I noticed that the column header in my file matches the customized label I see in the UI, yet the error message refers to a different, native system name.

upload failure, column mapping, project code, cost center code, native field, transformation , KBA , BNS-FG-INT-UP , Integration - Uploads , Problem