App installs and package updates stop working after stable release

On my pioneer kit, Update does not see any packages to upgrade. But it should, for example, upgrade libzmq5 to version 4.3.1-4+deb10u1 from security.debian.org.

The reason for this is that the repository has changed its Version and Suite:

$ sudo apt update
Get:1 http://security.debian.org/debian-security buster/updates InRelease [39.1 kB]
Get:2 http://deb.debian.org/debian buster InRelease [118 kB]
Get:3 http://deb.debian.org/debian buster-updates InRelease [46.8 kB]
Get:4 http://deb.debian.org/debian buster-backports InRelease [37.3 kB]
N: Repository 'http://security.debian.org/debian-security buster/updates InRelease' changed its 'Version' value from '' to '10'
E: Repository 'http://security.debian.org/debian-security buster/updates InRelease' changed its 'Suite' value from 'testing' to 'stable'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
Do you want to accept these changes and continue updating from this repository? [y/N]

Once these changes are accepted, then the updates continue as expected.

We should find a proper solution for the next stable release.