phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('965405a4e98fd24dd1d2989774d0158b', -1, 1603694878, 1603694878, '00000000', 0, 0)

Line : 152
File : /home/nlsb/public_html/forum/includes/sessions.php