Configuration controller & cannot use other controllers

What causes this issue?

A customer controller that is set as a configuration controller may not
use any other components or controllers.

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?

Delete all controller usages for &V1& or remove them using attribute
<SE>Configuration controller</> for &V1&. .

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.