phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b16c8da265ddb04049bc189e0a4b4bb8' 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 ('b16c8da265ddb04049bc189e0a4b4bb8', -1, 1547877695, 1547877695, '36cdd357', 21, 0, 0)

Line : 198
File : sessions.php