Please consider endorsing ER 99572 - Allow removal of PO line to revert to Purchase Request
Once a Purchase Request is added to a Purchase Order, the Source is no longer available even if the related PO line is cancelled or deleted. If a different Purchase Order is created, the Source must be manually added.
The Proposed Solution is to provide an option to remove the Source from the Purchase Order line and restore the respective Purchase Request so it can be found and processed in the established methods, whether via POInterface or selection in Manage Purchase Requests.