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 ('26397366111d3b8c699336da449a3d3f', -1, 1669928923, 1669928923, '00000000', 0, 0)

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