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 ('0f8e691303476a6f5757e15a7fa02800', -1, 1406064763, 1406064763, '36c4c72e', -1, 0, 0)

Line : 187
File : sessions.php