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 ('a19f79d2189a9d6c3b00ea6e0df5b342', -1, 1722038890, 1722038890, '030f895e', 9, 0, 0)

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