可以删除对管理工作没有用的策略。

A policy can be deleted if it is not useful in the administrative work.

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如果您决定删除对特定模板所作的更改，您只需点击该按钮。

If you decide that you want to delete all changes that you've made to a particular template, simply click that button.

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现在，要避免此错误，您需要在删除歌曲以前手动删除对它的引用。

For now, to avoid this error, you need to remove references to a song manually before deleting it.

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