You cannot delete settlement unit &1

What causes this issue?

You cannot delete settlement unit &v1& as one of the following applies:
It has already been generated
It is allocated to a point of delivery
It is allocated lower-level settlement units

System Response

You cannot delete settlement unit &v1&.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.