> 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/latex-errors/29-there-were-multiply-defined-labels.md).

# There were multiply-defined labels

This error is related to cross-referencing. It appears when you use the same label multiple times for different objects, causing LaTeX to get confused when **`\ref{...}`** is used.

## Common Causes

**Same label used multiple times:**

The most basic example of such an error is simply giving the same label to different objects as shown below

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

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

Here, both the image (image.jpg) and the section (Section 1) have been labelled as *algebra*, causing LaTeX to get confused as to which one to reference when **`\ref{algebra}` is used.** This will lead to an error as shown below

main.tex

There were multiply-defined labels.

To resolve this, rename one of the labels to something else.


---

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