Requisition approved and PO autocreated - Requestor goes and changes the Requisition, it does not go

Hi

This is a peculiar situation, wherein, the Requester raises the Requisition goes for approval.

The Approval approves based on the facts of original request.

Buyer autocreates PO and the approver  approves the PO

At this juncture, Requestor goes and changes the requisition, but this is not going through the Requisition approvals.

However, PO status changes to incomplete.

Is there any standard setup through which we can get the requisition goes back for approval?

Regards

Radha