phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a1a43a484a48e8f7593e3361a05b482e' 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 ('a1a43a484a48e8f7593e3361a05b482e', -1, 1555590795, 1555590795, '365a56e7', 22, 0, 0)

Line : 198
File : sessions.php