fix

ansible/roles/debian/tasks/main.yml

@@ -4,11 +4,16 @@
     removes: /etc/apt/sources.list.d/pve-enterprise.list
   changed_when: true
 
+- name: "Check for MariaDB repo file"
+  ansible.builtin.stat:
+    path: /etc/apt/sources.list.d/mariadb.sources
+  register: _mariadb_repo_stat
+
 - name: "Read MariaDB repo file (if present)"
   ansible.builtin.slurp:
     path: /etc/apt/sources.list.d/mariadb.sources
   register: _mariadb_repo_content
-  ignore_errors: true
+  when: _mariadb_repo_stat.stat.exists
 
 - name: "Remove stale MariaDB 12.2 repo (not available for trixie)"
   ansible.builtin.file: