Oracle : Ошибка ORA-28168

28168, 0000, "attempted to grant password-protected role"
*Cause: An ALTER USER ... GRANT CONNECT command was attempted specifying a
role that is protected by a password as a role which the proxy may
execute on behalf of a client.
*Action: Either specify a role that does not have a password or alter the
role so that a password is not required.

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