Can you transfer committed costs within Project Accounting?

Summary:

Purchase Orders are created for a project related transaction but they are not sure for which project at the time of PO creation. The PO is assigned to a default project until the correct project is identified. At this point the committed costs have already been processed through to project accounting. The need is to then transfer the committed costs from the default project to the correct project for each po line.

This cannot be done on the PO because it would require a Change order for each project added to the PO and there are too many transactions to submit change orders for.