phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1194 Table '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 ('ad4814d0d56488c9f1500ea64dc3390b', -1, 1408538433, 1408538433, '3650b9cc', -1, 0, 0)

Line : 172
File : sessions.php