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 ('bb31f3f5ed25d3e5a25b958b86248bf4', -1, 1425131566, 1425131566, '36a3452c', -12, 0, 0)

Line : 187
File : sessions.php