# idempotency_key_reused

> This key was already used within 24 hours with a different request.

**Idempotency-Key reused** · HTTP 422

## What it means

This key was already used within 24 hours with a different request.

## What to do

Use a new key for every distinct request; reuse a key only to retry the same request.

## Example

```json
{
  "type": "https://api.bymundi.com/problems/idempotency_key_reused",
  "title": "Idempotency-Key reused",
  "status": 422,
  "detail": "This key was already used within 24 hours with a different request.",
  "code": "idempotency_key_reused",
  "requestId": "req_…"
}
```

How to read any error: [Errors guide](https://api.bymundi.com/docs/guides/errors.md).