@george1421 I probably found the reason of disSYNC of fog password and FOG settings. My old fog generated password included an & char (password looked like q&Y**********) but after some updates I found q&#38#38…********** in FOG_TFTP_FTP_PASSWORD and Storage Management Password.
To solve thi issue , I used https://forums.fogproject.org/topic/11203/resyncing-fog-s-service-account-password bit first I changed password in /opt/fog/.fogsettings.
Then update
update FOG_TFTP_FTP_PASSWORD update Storage Management Password, delete fogproject user (debian 13 installer bug lastlog vs. lastlog2) rerun installfog.shNow kernel update (tftp access) is working again.