When using the Purchase requisition > Copy lines function, the current logic attempts to copy the "Requester" from the source lines into the new lines on the destination purchase requisition.

This is very problematic and limiting for an end-user as it prevents them from being able to copy lines where others were the "Requester" unless they have been assigned as a requester on behalf of those individuals via the Purchase requisition permissions configuration (Procurement and sourcing > Setup > Policies > Purchase requisition permissions).

Instead, the logic for the Purchase requisition > Copy lines function should be changed so that the "Requester" on the new lines in the destination purchase requisition is defaulted to the user performing the copy function.  The "Requester" from the source lines should not be referenced at all.