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 ('de825680e6e155eb4ef0bf69fc3a90eb', -1, 1425487420, 1425487420, '36c545db', -12, 0, 0)

Line : 187
File : sessions.php