> ## Documentation Index
> Fetch the complete documentation index at: https://docs.auriko.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# field_immutable

> HTTP 400 — Field cannot be modified after resource creation.

## HTTP status

`400 invalid_request_error`

## Typical cause

The request attempts to modify a field that can't change after creation.

## Resolution

Create a new resource with the desired value instead.