PO delivery schedule Tab

Hi,

I have a PO for which I have done GR and IR. This PO is made wrt a PR.

Now once I have done the GR and IR of the PO, I am able to remove the PR reference number from the delivery schedule Tab of PO.

By doing so the refrencing PR is open again.

Is there any standard solution to disable the removing of PR reference number from the delivery schedule Tab of PO.

Regards,