Unmatched Data Type
The row submitted did not match any known data type.
The row submitted had a value which was unexpected, and does not match a valid data type. The Data Type column is used to route submissions to the right processes. When the uploader is unable to determine where a row should be sent, it marks it as unmatched, and rejects the row.
This most often happens when you delete the first column or add an additional column in front of the Data Type.