# Error: send_in_progress

> A request with this Idempotency-Key is still in flight

Source: https://docs.vlayers.ai/errors/send_in_progress

- HTTP status: 409
- Retry: Yes, after a short wait
- details: `notBefore`, when known.

## What happened

A request with this Idempotency-Key is still in flight.

## Why

Another request with the same `Idempotency-Key` is being processed.

## How to fix it

Retry with the same key after `retry-after` (30 seconds).

## Example response

```json
{
  "error": "send_in_progress",
  "message": "A request with this Idempotency-Key is still in flight.",
  "requestId": "req-8f2c1d4b",
  "retryable": true,
  "docs": "https://docs.vlayers.ai/errors/send_in_progress"
}
```