phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './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 ('d30eaeb23ba62eb9f618d50c7870e0cf', -1, 1427581200, 1427581200, '36cda7bb', 40, 0, 0)

Line : 187
File : sessions.php