PO Change Orders

Apologies if this is being asked in the wrong space... The same goes for the '101 Basic question'

I have a user asking if when a Change order is initiated if the deapertment number originally attached to the PO can remain by default and not automatically change to the department of the person performing the Change Order. - The current process is for the staff making the change, to re-enter the original department number, but as with most things done manually, this is not always accomplished.

Many Thanks