Change and Rlease purchase order (New item should not be added)

Hi,

In change PO and Release PO transaction user's can add new item again release and make GR and invoice of backdated PO's

is there any provision to disable/freeze function of once GR/IV done, even in case of partial delivery:

once GR of any item done then system should not allow to add new item in same PO

using field selection user may add new item by copying existing item, or even Delivery Completed indicator change Qty and value.

Thank you,

Guruprasad