No authorization to write authorizations of user &1

What causes this issue?

You wanted to save authorization &v3& for user &v1&, and authorization
object &v2&.
You are not authorized to do this.

System Response

Authorization &v3& has not been saved.

How to fix this error?

Make sure that you receive sufficient authorization for this action.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.