phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'afdfcaf9fcba6430e60b25a50ea1a6f4' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('afdfcaf9fcba6430e60b25a50ea1a6f4', -1, 1555878026, 1555878026, '365a56e7', 3, 0, 0)

Line : 198
File : sessions.php