&1 is the standard hierarchy of controlling area &2

What causes this issue?

&V1& is already reserved as the name for the standard hierarchy
in controlling area &V2&.

System Response

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

How to fix this error?

Correct your entry.
If you wish, you can also change the name reservation.
Set the <DS:SIMG.SIMG_CFMENUORK1OKKS>current controlling area</> to
&V2&.
Change the <DS:SIMG.SIMG_CFMENUORK10KE5>name of the standard
hierarchy</>.
Then set the <DS:SIMG.SIMG_CFMENUORK1OKKS>current controlling area</>
back to &V3&.

Error message extract from SAP system. Copyright SAP SE.