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 ('67ca4dd5d2e04a3486229d30e74530d1', '54.82.78.213', 'CCBot/2.0 (http://commoncrawl.org/faq/)', 1518928210)