SAP Message C2235 - Procurement element change records still exist for order &1

Diagnosis
In order change management, production order <(>&<)>V1& has procurement
element change records that have not yet been completed.

System Response
The system does not permit the setting of deletion flags/technical
completion/close if procurement element change records are still open.
This is because no more changes can be made to an order that has
a deletion flag, has been technically completed or closed.

Procedure
Carry out the change processes for the production order or cancel the
change process by manually closing the procurement element change
records. Then carry out the function "Set deletion flag"/"Technical
completion"/"Close" again.