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

# precondition_failed

> The resource has changed since the value you last read. Refresh and retry.

|             |                                                     |
| ----------- | --------------------------------------------------- |
| HTTP status | `412 Precondition Failed`                           |
| `code`      | `precondition_failed`                               |
| `type`      | `https://docs.vturb.com/errors/precondition_failed` |

The resource has changed since the value you last read. Refresh and retry.

```json theme={null}
{
  "type": "https://docs.vturb.com/errors/precondition_failed",
  "code": "precondition_failed",
  "message": "The resource has changed since the value you last read. Refresh and retry.",
  "request_id": "0b5e7a1c-9f3d-4c2b-8e1a-7d6c5b4a3f21"
}
```