Re: Why apt suddenly lists packages from "stable-backports" as upgrade candidates for packages from "stable"?

[Max Nikulin <manikulin@gmail.com>]

On 03/12/2025 01:39, Alexander V. Makartsev wrote:
> It lists packages from "stable-backports" as upgrade candidates for 
> packages from "stable".
[...]
> $ cat /etc/apt/sources.list.d/debian.sources

"apt policy" (*without* package name) might help to reveal other files 
or preferences like improper Default-Release.

> $ apt policy curl
> curl:
>    Installed: 8.14.1-2+deb13u1
>    Candidate: 8.16.0-4~bpo13+1
>    Version table:
>       8.16.0-4~bpo13+1 100
>          100 https://deb.debian.org/debian trixie-backports/main amd64 
> Packages
>   *** 8.14.1-2+deb13u1 100
>          100 /var/lib/dpkg/status
>       8.14.1-2 500
>          500 https://deb.debian.org/debian trixie/main amd64 Packages

<https://tracker.debian.org/pkg/curl>

[2025-11-09] Accepted curl 8.14.1-2+deb13u2 (source) into 
proposed-updates (Debian FTP Masters) (signed by: Samuel Henrique)

My guess is that "apt update" should cure the issue (unless your mirror 
is stale).

Perhaps apt can not distinguish cases when some package version is 
removed from backports and from proposed updates, so it just picks 100 
(locally installed and missed in repositories) to 100 (backports) upgrade.