root@imx8mnevk:~# apt update --allow-insecure-repositories
Get:1 http://ftp.debian.org/debian buster InRelease [122 kB]
Get:2 http://ftp.debian.org/debian buster-updates InRelease [51.9 kB]
Ign:1 http://ftp.debian.org/debian buster InRelease
Ign:2 http://ftp.debian.org/debian buster-updates InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
65 packages can be upgraded. Run 'apt list --upgradable' to see them.
W: GPG error: http://ftp.debian.org/debian buster InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
W: The repository 'http://ftp.debian.org/debian buster InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http://ftp.debian.org/debian buster-updates InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
W: The repository 'http://ftp.debian.org/debian buster-updates InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.