# idempotency_key_in_use

> A request with the same Idempotency-Key is still being handled. Wait a moment, then send the same request again.

HTTP `409` · `retryable` is `false`

The first request with this key has not finished, for example one still holding a `?wait=`. Kabu will not run the
same request twice at once.

**What to do:** wait a moment and send the same request, with the same key and body. It then returns the first
request's result. `kabu` retries this for you.

## The response

Every error comes as `application/problem+json`; [Errors](/docs/errors) explains each field.

```json
{
  "type": "https://usekabu.com/docs/errors/idempotency_key_in_use",
  "title": "Idempotency key in use",
  "status": 409,
  "code": "idempotency_key_in_use",
  "detail": "…",
  "hint": "…",
  "retryable": false,
  "request_id": "req_…",
  "doc_url": "https://usekabu.com/docs/errors/idempotency_key_in_use"
}
```