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 ('50f1a6b90830081e55f03946e8d1be06', -1, 1425009726, 1425009726, '369fcd25', -12, 0, 0)

Line : 187
File : sessions.php