Adding requisition to an Open purchase order

Summary

Adding requisition to an Open purchase order

Content

Hi All,

As a part of recent upgrade 20A/B, now we are allowed to add approved requisitions to existing purchase orders on Process requisition page. In the screenshot it is shown that we can add to an "Open" purchase orders but when i was trying to perform the same scenario, i was able to add requisition only to the POs  which were either Incomplete, withdrawn or rejected.

I want to add the requisition to an already approved PO but unable to do it. The PO does not show up in the search results.