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 ('75e3a229cc01d79d2bf99e505b8e8bd5', -1, 1369078997, 1369078997, '6b169ccd', 20, 0, 0)

Line : 172
File : sessions.php