# idempotency_key_reused

> This Idempotency-Key was used for a different order, account or batch; this request was not sent.

Source: https://tickwire.io/docs/errors/idempotency_key_reused/

HTTP 409, 422. Nothing reached the broker.

**Likely cause:** A key was reused for a new request.

**What to do:** Use a new key; the earlier request stands.

**Retry:** No. The same request gets the same answer; change something first.

Listed under [Orders and idempotency](https://tickwire.io/docs/errors/#orders-and-idempotency) in [Errors](https://tickwire.io/docs/errors/). Send the error's `requestId` to support and we can find the request.