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 ('35afe850e2294217735de5230531b9e6', '54.158.157.214', 'CCBot/2.0 (http://commoncrawl.org/faq/)', 1485071638)