How to configure apt in Debian Buster after release
tl;dr : run once apt-get update --allow-releaseinfo-change
What happens here, is that the local apt database remembered your package-sources "release-information" to be "busterAsTesting", and when updating now "busterAsStable" is returned.
This results in the error, and the indication, that you need to "allow the change of the release version information".
Luckily, apt-get has an option for that, aptly named allow-releaseinfo-change
When running apt-get with this option, it notices -as without- the version discrepancy (the N:-lines), but now accepts it as told to do, and then updates the local database.
- open synaptic
- in menu select settings-->repositories
- in tabs uncheck everything
- close the tabs and let it make the update
- open again the repositories dialog and check everything you want
- close the tabs and update again and it is OK
I suggest using
apt update --allow-releaseinfo-change
This was because apt-get update --allow-releaseinfo-change did not work for me.
I cant comment on the accepted answer above. So if all else fails, use my answer.