- set_fact:
    defaultgroup:
      system: true
      state: present
      gid: "{{ omit }}"

- set_fact:
    group: "{{ defaultgroup|combine(item.value|d({}), {'name': item.key} ) }}"

- name: create groupss
  group:
    name: "{{ group.name }}"
    system: "{{ group.system }}"
    state: "{{ group.state }}"
    gid: "{{ group.gid|d(omit) }}"