Oracle Error ORA-28024: must revoke grants of external roles to this role/user

Oracle Error Message

ORA-28024: must revoke grants of external roles to this role/user

Reason for the Error

The user or role altered to IDENTIFIED GLOBALLY has external roles directly granted – these must be revoked, since external roles cannot be granted to global users or roles.

Solution

Use REVOKE to revoke the external roles from the user or role to be ALTERed.