phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd247e5ffbbbd5b52198fabf6df36c6bc' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('d247e5ffbbbd5b52198fabf6df36c6bc', -1, 1772103112, 1772103112, 'd849d8b4', -2, 0)

Line : 180
File : /www/includes/sessions.php