它必须需要一个 `key` 字段,[复现demo](https://huangmingfu.github.io/ant-design-vue-playground/#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)  但是我用 `fieldNames` 指定替换了它的 `key` 为 `id`, ```ts const fieldNames: TreeProps['fieldNames'] = { children: 'child', title: 'name', key:'id' }; ``` 