Hi,
I think there will be two cases,
Case 1: Close the Current PO by setting Delivery completion Indicator.
And create the new STO to plant 2 for quantity of 44,000 Kg.
Case 2: Do GR and IR for remaining quantities in plant 1 and Transfer the quantity of 44,000 Kg to
Plant 2 either by new STO or Transfer posting (301).
Regards,
Keerthi