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 ('cd37fe4c1241d6c18de1be52e75a2b53', -1, 1413892663, 1413892663, '365279da', -1, 0, 0)

Line : 187
File : sessions.php