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 ('2d6d8d086054b9f0caee488b4b88b1cc', -1, 1425036832, 1425036832, '36cd6576', -12, 0, 0)

Line : 187
File : sessions.php