Cause: The role altered to IDENTIFIED
GLOBALLY was granted to one or more other users and/or roles. Global roles
cannot be granted to any user or role.
Action: Use REVOKE to revoke the role
from other users or roles first.

Relared Errors:
ORA-28024: must
revoke grants of external roles to this role/user
ORA-28025:
missing or null external name
ORA-28026: user
with same external name already exists
ORA-28027:
privileged database links may be used by global users
ORA-28028:
could not authenticate remote server
ORA-28029:
could not authorize remote server for user string
ORA-28030:
Server encountered problems accessing LDAP directory service
ORA-28031:
maximum of string enabled roles exceeded
ORA-28035:
Cannot Get Session Key for Authentication
ORA-28037:
Cannot Get Session Key for RACF Authentication