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 ('da6bf8d9960e0a8fe7d2f6baf02f4fbf', -1, 1425556320, 1425556320, '36a34e2f', -12, 0, 0)

Line : 187
File : sessions.php