phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './allonssortir/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 ('4bd030143d57048a0ee3bda86a182b4e', -1, 1425272306, 1425272306, '3657b5ce', -12, 0, 0)

Line : 187
File : sessions.php