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 ('37651f0ebb55472d4d4dcd651a7d05fd', '54.161.3.96', 'CCBot/2.0 (http://commoncrawl.org/faq/)', 1511297697)