Is there a way to edit Business Unit in the Offer section of a requisition?

Summary: We are going through some organizational changes and are needing to change the Business Unit (Offer Section) on older requisitions. These have been posted and may have applicants, so there is no way to send back to draft. The End user guide states the following screen shot below. We have some requestions (maybe most) that are created by Job or a copy of an existing (originally from a job).

What is the best way to update these that cannot be edited?

Version (include the version you are using, if applicable): 23A (soon to be 23C)