The mapping matches a column in Excel to a field in FileMaker.
And the identified target table "contacts" doesn't sound like a good match to a source called Gift_Pledge Transactions. That sounds like you need to be on a layout to a different table before selecting "Import Records" if you are doing this by hand.
Can you produce an example of what the Excel spreadsheet looks like? (with anonymized donor info of course--only need a row or two).
Thank you for your reply.
I created an example of what the excel sheet looks like.
Let me know if you need more.
Still looks like you were attempting to import data into the wrong table.
I also recommend selecting the "don't import first record (contains field names) option