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, session_admin) VALUES ('5b5601e8280966b26e7b4b4d0a1e9b91', -1, 1722047301, 1722047301, '0d3be247', 27, 0, 0)

Line : 172
File : /home/rebkell/public_html/boards/includes/sessions.php