phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb/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 ('5c8ad8827ea4ed948e1d26ec7f5593c1', -1, 1409289289, 1409289289, '6b1479fe', -1, 0, 0)

Line : 187
File : sessions.php