IDEMPOTENCY_IN_FLIGHT Original request still in progress

HTTP status
409
Credit
No credit taken

Meaning

A request with this Idempotency-Key is still being processed, so it was not repeated.

Fix

Wait for Retry-After, then resend with the same key and body to get the first request's result.

Example response

{
  "type": "https://checkslip.com/problems/idempotency-in-flight",
  "title": "Original request still in progress",
  "status": 409,
  "code": "IDEMPOTENCY_IN_FLIGHT",
  "instance": "01a18600-0000-7000-8000-000000000000"
}