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 ('dc55755d3888a2545cfeb9dde0002b13', '54.166.203.17', 'CCBot/2.0 (https://commoncrawl.org/faq/)', 1537918561)