Superior order & already completed

What causes this issue?

You entered an already technically completed
<GL:maintenance_order>maintenance order</> as superior order. This is
not allowed.
The superior order stands for the total task, that may not by completed
before the individual part tasks.

System Response

INCLUDE 'KEINE-VERARBEITUNG' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

Check your entry and correct it if necessary.
If it is the correct order, contact the employee responsible for the
total task.

Error message extract from SAP system. Copyright SAP SE.