# Page Not Found

The URL `setup-guides/update-guides/update-or-1.20.4-to-1.21` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Update | 1.20.4 to 1.21](https://docs.nitrosetups.com/docs/setup-guides/premium-setups/update-guides/old-update-guides/update-or-1.20.4-to-1.21.md)
- [Update | 1.21.8 to 1.21.11](https://docs.nitrosetups.com/docs/setup-guides/ultimate-setups/update-guides/update-or-1.21.8-to-1.21.11.md)
- [Update | 1.21.8 to 1.21.11](https://docs.nitrosetups.com/docs/setup-guides/premium-setups/update-guides/update-or-1.21.8-to-1.21.11.md)
- [Update | 1.21.4 to 1.21.8](https://docs.nitrosetups.com/docs/setup-guides/ultimate-setups/update-guides/old-update-guides/update-or-1.21.4-to-1.21.8.md)
- [Update | 1.20.2 to 1.20.4](https://docs.nitrosetups.com/docs/setup-guides/premium-setups/update-guides/old-update-guides/update-or-1.20.2-to-1.20.4.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://docs.nitrosetups.com/docs/setup-guides/premium-setups/update-guides/old-update-guides/update-or-1.20.4-to-1.21.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://docs.nitrosetups.com/docs/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://docs.nitrosetups.com/docs/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/docs/setup-guides/premium-setups/update-guides/old-update-guides/update-or-1.20.4-to-1.21.md`).

You may also use `Accept: text/markdown` header for content negotiation.