# `IDEMPOTENCY_KEY_REUSED` Idempotency-Key reused for a different request

Source: https://checkslip.com/en/problems/idempotency-key-reused

- **HTTP status**: `422`
- **Credit**: No credit taken

## Meaning

The same `Idempotency-Key` came with a request body different from the first one, so nothing was repeated or done.

## Fix

Use a new key for a new request; when retrying, send the same key with exactly the same body.

## Example response

```
{
  "type": "https://checkslip.com/problems/idempotency-key-reused",
  "title": "Idempotency-Key reused for a different request",
  "status": 422,
  "code": "IDEMPOTENCY_KEY_REUSED",
  "instance": "01a18600-0000-7000-8000-000000000000"
}
```