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 ('8eb45b3faeaff866ddad5b86afa4b9fd', -1, 1425156319, 1425156319, '36a7b3d2', -12, 0, 0)

Line : 187
File : sessions.php