Diagnosis
Order <(>&<)>V1& has the status "Change forbidden" because a change
process from Order Change Management for Production Orders has not
yet been completed.

System Response
As long as the change process for the production order is not complete,
the system cannot set the deletion flag.

Procedure
Complete the change process for the production order or cancel the
change process by manually closing the procurement element changerecord
for the production order. Then carry out the "Set deletion flag"
function again.