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 ('84194c7d8856eac54db7e3fa44ac5a65', '54.167.232.42', 'CCBot/2.0 (http://commoncrawl.org/faq/)', 1503372177)