Cause: The IDENTIFIED GLOBALLY clause
was specified twice.
Action: Use only one IDENTIFIED GLOBALLY
clause.

Relared Errors:
ORA-28021:
cannot grant global roles
ORA-28022:
cannot grant external roles to global user or role
ORA-28023: must
revoke grants of this role to other user(s) first
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