diff --git a/roles/installer/tasks/database_configuration.yml b/roles/installer/tasks/database_configuration.yml
index 8165a1fb8..424580688 100644
--- a/roles/installer/tasks/database_configuration.yml
+++ b/roles/installer/tasks/database_configuration.yml
@@ -129,7 +129,7 @@
       set_fact:
         sorted_old_postgres_pods: "{{ filtered_old_postgres_pods |
           sort(attribute='metadata.name') |
-          reverse }}"
+          reverse | list }}"
       when: filtered_old_postgres_pods | length