Fixed a non working conditional for Debian

postgresql/tasks/db_init.yml

 ---
 
-- name: On vérifie que la base n'existe pas déjà
+- name: On vérifie que la base n'existe pas déjà sur CentOS
   stat:
     path: "{{path_to_icat}}/postgresql.conf"
-  register: stat_result
-  when: (ansible_facts['distribution'] == "CentOS")
+  register: stat_result_centos
+  when: ansible_facts['distribution'] == "CentOS"
 
-- name: Initialisation de la base de données ICAT
+- name: On vérifie que la base n'existe pas déjà sur Debian
+  stat:
+    path: "/etc/postgresql/{{ postgresql_version.version.major }}/{{ cluster_name }}/postgresql.conf"
+  register: stat_result_debian
+  when: ansible_facts['distribution'] == "Debian"
+
+- name: Initialisation de la base de données ICAT sur CentOS 7
   command: /usr/pgsql-9.6/bin/initdb -D {{path_to_icat}}
   become: true
   become_user: postgres
-  when: stat_result.stat.exists == False and (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7")
+  when: stat_result_centos.stat.exists == False and (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7")
 
-- name: Initialisation de la base de données ICAT
+- name: Initialisation de la base de données ICAT sur CentOS 8
   command: /usr/bin/initdb -D {{path_to_icat}}
   become: true
   become_user: postgres
-  when: stat_result.stat.exists == False and (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8")
-
-- name: Initialisation de la base de données ICAT
- command: /usr/bin/pg_createcluster -d {{ path_to_icat }} {{ postgresql_version.version.major }} {{ cluster_name }}
- become: true
- become_user: postgres
- when: (ansible_facts['distribution'] == "Debian" and ansible_facts['distribution_major_version'] == "10")
+  when: stat_result_centos.stat.exists == False and (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8")
 
+- name: Initialisation de la base de données ICAT sur Debian 10
+  command: /usr/bin/pg_createcluster -d {{ path_to_icat }} {{ postgresql_version.version.major }} {{ cluster_name }}
+  become: true
+  become_user: postgres
+  when: (ansible_facts['distribution'] == "Debian" and ansible_facts['distribution_major_version'] == "10" and stat_result_debian.stat.exists == False)
 
 ...