phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1195 Table 'phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('272cc83bc5e906506eb2a4179bde90ee', -1, 1284098574, 1284098574, '266bbf57', -9, 0, 0)

Line : 189
File : sessions.php