Live Data Table Updates - Can't omit a column

Summary:

We have a Live Data Table that receives regular updates via an automated file import task (push to CPQ's SFTP, it triggers an automated file import). This data table has one column that we do not want updated, since it is manually adjusted via a CPQ process instead. We were leaving this column out of the file, which was working fine up until 24B over the summer. At this point the import started failing due to a "column mismatch". I'm guessing that update requires the # of columns in the file to map 1:1 onto the table.

By adding the (manually adjusted) column to the file, the import is working again; however, it is now overwriting the field with blanks.