Debian previous pgbackrest version

Hi,

Actually pgBackRest version is 2.41 on Debian. Unfortunately pgBackRest cannot mix different versions. I need to install the previous version 2.40 on our new Debian 10 server.

The command apt-cache policy pgbackrest list the current version only :

    2.41-1.pgdg100+1 500

        500 http://apt.postgresql.org/pub/repos/apt buster-pgdg/main amd64 Packages

        100 /var/lib/dpkg/status

     2.10-1 500

        500 http://deb.debian.org/debian buster/main amd64 Packages

My actual apt file /etc/apt/sources.list.d/pgdg.list is :

deb http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main

I would enjoy to find any information on this topic.

Regards