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 ('23a2fa18a2e04b31b0cd7222508ce3d8', -1, 1722037470, 1722037470, '12e36953', -4, 0, 0)

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