ansible_distribution error

[Jessie-Lazo]

I've been facing an issue with my code, I'm not sure if it's because of the version of my ansible, which is 2.5.1. I am not able to upgrade further, it is not allowing me. So, I am looking for alternatives solutions how to fix the error I get.

• hosts: all
  become: true
  gather_facts: yes
  pre_tasks:

  • name: install update and repositories (CentOS)
    tags: always
    dnf:
    name: "*"
    update_cache: yes
    state: latest
    changed_when: false
    when: ansible_distribution == "CentOS"

  • name: install update and repositories (Ubuntu)
    tags: always
    apt:
    upgrade: yes
    update_cache: yes
    cache_valid_time: 86400
    changed_when: false
    when: ansible_distribution == "Ubuntu"

The error is ansible_distribution == "CentOS" undefined.
My centos is using python3 which I already included in my inventory as interpreter.
my ubuntu does not have any problem. I also check ansible setup and see that under my ubuntu server there is ansible_distribution while under centos server it is not appearing.

Thank you for any response that can help resolve this issue.