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 ('b8564482f96336d53de3e3c2f4167afd', -1, 1425472924, 1425472924, '36a1e133', -12, 0, 0)

Line : 187
File : sessions.php