request_not_found

No trade was recorded under this Idempotency-Key.

HTTP 404.

Likely cause: Nothing was sent with it, or it was refused before sending.

What to do: It is safe to send the order with this key.

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

Listed under Orders and idempotency in Errors. Send the error’s requestId to support and we can find the request.