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 ('2eb6aee9e2fb6749d9edc2e55ca2901d', -1, 1467040928, 1467040928, '36a7c2b6', 40, 0, 0)

Line : 187
File : sessions.php