phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './forum/phpbb2_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('fdebd800b8f6eb85cd4813b9b3d9736e', -1, 1455300019, 1455300019, '1716b61d', 8, 0, 0)

Line : 373
File : sessions.php