Today I’ve been getting the following errors from “apt-get update”:

E: Repository 'http://deb.debian.org/debian buster InRelease' changed its 'Suite' value from 'testing' to 'stable'
E: Repository 'http://deb.debian.org/debian-security buster/updates InRelease' changed its 'Suite' value from 'testing' to 'stable'
E: Repository 'http://deb.debian.org/debian buster-updates InRelease' changed its 'Suite' value from 'testing-updates' to 'stable-updates’

The solution (for me) was to run

apt-get update --allow-releaseinfo-change

once.

Thought this might be useful for anybody else hitting the same issue.

Cheers,

Mike