> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/zh-cn/latex-cuo-wu/29-there-were-multiply-defined-labels.md).

# 存在重复定义的标签

此错误与交叉引用有关。当你对不同对象多次使用同一个标签时，就会出现该错误，导致 LaTeX 在……时感到困惑 **`\ref{...}`** 被使用时。

## 常见原因

**同一标签被多次使用：**

这种错误最基本的例子就是像下面所示那样，将同一个标签赋给不同的对象

```latex
\section{Section 1}
\label{algebra}

\includegraphics{image.jpg}
\label{algebra}
```

在这里，图片（image.jpg）和章节（Section 1）都被标记为 *algebra*，导致 LaTeX 不确定在……时应引用哪一个 **`\ref{algebra}` 被使用时。** 这将导致如下所示的错误

main.tex

存在多个重复定义的标签。

要解决此问题，请将其中一个标签重命名为其他名称。


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://overleaf-pro.ayaka.space/latex/zh-cn/latex-cuo-wu/29-there-were-multiply-defined-labels.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.