If existing consumers aren't using a mandatory message element, then changing or removing that element need no longer be considered a breaking change.

若现有消费者未用到某必备消息元素，那么修改或去除该元素就不用被看成是一种破坏性变化。

youdao

If existing consumers aren't using a mandatory message element, then changing or removing that element need no longer be considered a breaking change.

若现有消费者未用到某必备消息元素，那么修改或去除该元素就不用被看成是一种破坏性变化。

youdao