Purchase Requisition Closure

Hi,

1) I have a scenario where a PR is raised for 100 qty of a certain item and released. A PO is then created (based on the PR) for Qty of 70. Now I donu2019t want another PO to be created for the remaining 30 qty (based on the same PR).

So is there a way to close (not delete) a purchase requisition even after it has been released so no more purchase order can be created out of it?

2) How to configure the SAP to automatically close a PR, if a PO is created for all items of a PR (with the exact quantities in the PR)?