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Frequent errors include duplications of already entered crop data. This may result if the source document provides revisions of the previous year data, which was entered into the FDW last year. There are a variety of methods you should use to identify duplicates, as all duplicates will produce an error upon upload into the FDW.
Save File names should be kept consistent by naming the final file with the file name naming convention CountryCode_AgStats (e.g., El Salvador file name would be SV_AgStats).