phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO forum_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, is_robot, session_admin) VALUES ('414dfdd71dd75fc319038af00f54fff4', -1, 1487564069, 1487564069, '36a3a443', 12, 0, '0', 0)

Line : 189
File : sessions.php