'Not perform' is not possible

What causes this issue?

You want to set the status <zh>Not performed</> for the service order.
This is not allowed because a quotation for this service order has
already been accepted.

System Response

INCLUDE KEINE-FUNKTION OBJECT DOKU ID TX LANGUAGE EN

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.