What is best practice if possible to move the association of a Purchase Order from one Work Order to another? 

Scenario: Maintenance Purchase Requisition created from Work Order # 23. Maintenance Purchase Requisition converted to a Purchase Order. Purchase Order Released to Vendor. Realization is made that the Maintenance Purchase Requisition/Purchase Order was created from the wrong Work Order and needs to be moved to Work Order # 32. What would be the best way to go about that?