Enter only one installation location

What causes this issue?

You want to change the
<DS:GLOS.installation_location>installation location</> of a piece of
<DS:GLOS.equipment>equipment</> and have entered both a
<DS:GLOS.functional_location>functional location</> and a
<DS:GLOS.superior_equipment>superior equipment</>.
This is not supported because a piece of equipment may only be
installed at a certain point in time <ZH>either</>
at a functional location, <ZH>or</>
in a superior equipment.

System Response

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

How to fix this error?

Correct your entries as follows:

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

If you want to install the piece of equipment at a functional location,
cancel the entries of the superior equipment.
If you want to install the piece of equipment in a superior equipment,
cancel the entries of the functional location.

Error message extract from SAP system. Copyright SAP SE.