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 ('9b860600d5784c0af263acbe6b869ca5', -1, 1425351955, 1425351955, '3690d999', -12, 0, 0)

Line : 187
File : sessions.php