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

# changed_since

> Listing changed since. HTTP 409, not retryable.

**HTTP 409: Listing changed since.** Retrying the same request gives the same error. Errors never cost API credits.

**What to do:** The listing on Etsy no longer holds what this change set (`changed` names the fields), so reverting it could destroy a later edit. Nothing was written. Look at the listing, then make the edit you want with update.

```json Response theme={null}
{
  "type": "https://docs.alura.io/errors/changed_since",
  "title": "Listing changed since",
  "status": 409,
  "code": "changed_since",
  "detail": "Listing changed since",
  "suggestion": "The listing on Etsy no longer holds what this change set (`changed` names the fields), so reverting it could destroy a later edit. Nothing was written. Look at the listing, then make the edit you want with update.",
  "retryable": false,
  "request_id": "req_01JQ5W3H8M2N4P6R8T0V2X4Z6B"
}
```

The response is `application/problem+json` (RFC 9457) and has a `Request-Id` header with the same `request_id`. See [all errors](https://docs.alura.io/api-reference/errors.md).


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