Premium PO change Manual Standard PO
We have a problem here in our PO type, the buyer created a PO and she chose Premium PO. When the buyer saved this PO type the system automatically changed to manual Standard PO type. We are wondering because most of the premium PO's created by buyer were successful and there were no alteration of PO type happened.
I'd like to know how SAP handles Premium PO type changed to Manual Standard PO? Under what conditions/circumstances is this allowed?
Your response is greatly appreciated...