Ansible列表给出了弃用警告

我已经为更新iLO固件创建了一个Ansible playbook，它运行良好。然而，它给了我一个逗号分隔的列表值已被弃用的警告（我的其他剧本都没有给出这个警告）。我假设这与iLO_Models变量有关，因此我尝试将变量更改为只有一个模型，但仍然得到警告

Ansible版本是2.3.2.0。我只想修复我的代码，以删除警告，并确保它不会中断

---
- name: iLO Firmware Upgrade for Standalone Servers
  hosts: testing
  gather_facts: true
  gather_subset: hardware
  become: true
  vars:
    firmware_directory: /firmware
    iLO4: iLO4-2.54-CP032620.scexe
    iLO4_Models:
      - 'ProLiant DL320e Gen8 v2'
      - 'ProLiant DL380 Gen9'
      - 'ProLiant DL580 G9'
      - 'ProLiant BL460c Gen8'
      - 'ProLiant BL460c Gen9'
  tasks:
    - name: Copy iLO4 update
      copy: >
           src={{ firmware_directory }}/{{ iLO4 }}
           dest=/tmp/
           owner=root
           group=root
           mode=0640
      when: ansible_product_name in iLO4_Models

    - name: Install iLO4 Update
      shell: /bin/bash /tmp/{{ iLO4 }} -s
      when: ansible_product_name in iLO4_Models
      register: ilo_result
      changed_when: ilo_result.rc == 0
      failed_when: ilo_result.rc == 1 or ilo_result.rc == 4

我得到以下警告：

[DEPRECATION WARNING]: Using comma separated values for a list has been deprecated. You should instead use the correct YAML syntax for lists. .
This feature will be removed in a future release. Deprecation warnings can be disabled by setting 
deprecation_warnings=False in ansible.cfg.

---

这是因为

gather\u subset:hardware

替换为：

gather_subset: [hardware]

或：

---

这是因为

gather\u subset:hardware

替换为：

gather_subset: [hardware]

或：