A Database Error Occurred

Error Number: 1364

Field 'user_data' doesn't have a default value

INSERT INTO `ci_sessions` (`session_id`, `ip_address`, `user_agent`, `last_activity`) VALUES ('394c1c8b6bf3b65271cc2e9bf9a70f52', '216.73.216.216', 'Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko;', 1774345951)