Unable to install a specific version of Elastic Stack software (Ubuntu 20.04 LTS)

Elastic Stack Elasticsearch
1

Hi,

I have Ubuntu 20.04 LTS with the latest updates.

root@pk-elk1:/etc/kibana# uname -a
Linux pk-elk1 5.13.0-1028-azure #33~20.04.1-Ubuntu SMP Fri Jun 3 15:13:34 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

On this Ubuntu, I have APT repo added for Elastic 8.x.

I can check the available versions of the Logstash package in the repository, for example:

root@pk-elk1:/etc/kibana# apt-cache policy logstash
logstash:
  Installed: 1:8.3.2-1
  Candidate: 1:8.3.2-1
  Version table:
 *** 1:8.3.2-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
        100 /var/lib/dpkg/status
     1:8.3.1-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.3.0-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.2.3-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.2.2-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.2.1-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.2.0-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.1.3-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.1.2-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.1.1-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.1.0-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.0.1-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages
     1:8.0.0-1 500
        500 https://artifacts.elastic.co/packages/8.x/apt stable/main amd64 Packages

We can see that version 8.3.1 is available.

However, we can't force install version logstash=8.3.1:

root@pk-elk1:/etc/kibana# apt install logstash=8.3.1
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '8.3.1' for 'logstash' was not found
root@pk-elk1:/etc/kibana# apt install logstash=8.3.1-1
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '8.3.1-1' for 'logstash' was not found

Why does such a problem arise?
Any idea?

2

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