# InvalidNamespaceError

> **Class** in `langgraph.store`

📖 [View in docs](https://reference.langchain.com/python/langgraph.store/base/InvalidNamespaceError)

Provided namespace is invalid.

## Signature

```python
InvalidNamespaceError()
```

## Extends

- `ValueError`

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[View source on GitHub](https://github.com/langchain-ai/langgraph/blob/f55e77274dad40897ef7b2d52cc7c0b85b792247/libs/checkpoint/langgraph/store/base/__init__.py#L541)