Modify a paycheck

I am trying to modify a paycheck that was posted to the wrong department.  The employee went from having the vacation paid out to accruing vacation on each pay.  The 3 checks that I want to modify are from with the vacation was being paid out.  Sage tells me that I must make the adjustment manually.  Has anyone else encountered this issue?  Did you solve it?  Is there a fix?

Help

Thanks