# idempotency_conflict

> 409 Idempotency key reused. The Idempotency-Key was used in the last 24 hours with a different request.

| Status                     | Code                   | Retry?          |
| -------------------------- | ---------------------- | --------------- |
| 409 Idempotency key reused | `idempotency_conflict` | After fixing it |

## What it means

The Idempotency-Key was used in the last 24 hours with a different request. A key stands for one request.

## Common causes

- The same key was sent with a different body or to a different path.

## What to do

This Idempotency-Key was used in the last 24 hours with a different request. Use a new key for a new request.

## Can I retry it?

Only after you fix what the message names. Until then the same request gets the same answer.

## What the answer looks like

The answer, `409`:

```json
{
  "error": {
    "code": "idempotency_conflict",
    "message": "This Idempotency-Key was used with a different request.",
    "hint": "This Idempotency-Key was used in the last 24 hours with a different request. Use a new key for a new request.",
    "doc_url": "https://usebluebot.com/docs/errors/idempotency_conflict",
    "request_id": "req_1Hq2LxW9cVbN3mKpRtYs0a"
  }
}
```

Branch on `code`, which never changes. `message` and `hint` are written for people and may be reworded. Quote `request_id` when you write to support.

## Related

- [Errors](https://usebluebot.com/docs/errors): the envelope and every code
- [Idempotency](https://usebluebot.com/docs/concepts/idempotency): retrying without sending twice
- [Limits](https://usebluebot.com/docs/limits): every cap and what happens when you reach it