SAP Message WP3ROLES051 - Role &1 cannot be converted to a derived role of &2

Diagnosis
Role &V1& shall be converted to an authorization role, but role &V2&was specified as parent role.
Derived roles can only be newly created, but not be created byconversion of existing roles.

System Response
The function was not executed.

Procedure
Execute the function directly on the portal role, not on an alreadyexisting authorization role.