phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './med4um_phpbb/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('0864d255812e198ace2d5f4cf4a57001', -1, 1419257310, 1419257310, '3213ac00', 0, 0, 0)

Line : 180
File : sessions.php