Purchase orders already exist for item &

What causes this issue?

Purchase orders have already been created referring to the purchase
requisition (PR) item you want to delete. This leads to inconsistent PR
since commitment documents have also already created.

System Response

Transaction not allowed.

How to fix this error?

Undelete the PR item or cancel the transaction.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.