Need to change the PO Project charge account via requestor initiated change order is this possible?

Summary:

Requestors need the ability to update/change or split the PO charge account/Project details on requestor initiated change order on an existing PO

Content (please ensure you mask any confidential information):

Requestor has created the PO release against a BPA/CPA now how the need to update the PO charge account/Project details and the system will not allow it

Can that field be made editable via page composer or is there a privilege that could be given to allow for these types of changes.

I was able to via a requestor created change order I was able to split the PO Charge Account and reduce the first one and add a new one. However, when it had project info in the PO charge account could not update or split it. The problem we are experiencing is most of the accounting changes are for project related charge accounts.