You probably noticed a similar output after running “apt-get update” on your Debian Linux based system:
N: Repository ‘http://deb.debian.org/debian buster InRelease ‘ changed its ‘Version’ value from ‘10.9’ to ‘10.11’
E: Repository ‘http://deb.debian.org/debian buster InRelease ‘ changed its ‘Suite’ value from ‘stable’ to ‘oldstable’
[…]
This means that the major and minor version you are running (v10.9 in the example above) is no longer current and a newer version (v10.11 still in the example above) is available from the repo. From that point, you should no longer receive further updates from the repository (when running apt-get upgrade) unless you allow the updater to switch to the newer version.
To resolve this issue, just run the following command:
apt-get update --allow-releaseinfo-change