On 26/12/2023 23:23, Dan Ritter wrote:
https://wiki.debian.org/AptConfiguration#Be_careful_with_APT::Default-Release (quoted entirely)
But omitting a couple of links to comments from developers that APT::Default-Release is deprecated.
A tool to debug issues with upgrades is
    apt policy
that gives overview of configured repositories and their priority. When 
a specific package is known use
    apt policy openssh-client