JC_JobTransactionDetail table import question

I'm simply trying to change some comments for some records in the JC_JobTransactionDetail table.

The source code for the records I'm trying to change is "PR" and it is set correctly in the import job and in the source file.

The cost type is L for labor.

I guess the main question is this...is it possible to over-ride existing records using V/I for the JC_JobTransactionDetail file?

Thanks

Sage 100 2023 PU2