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) VALUES ('211d4b1279ec876129bb2218905d68c0', -1, 1284151879, 1284151879, '266bbf73', -4, 0)

Line : 158
File : sessions.php