Cause
The client_request_id was already used with other content; the second intent was not executed.
What to do
Use a new client_request_id for different content, or repeat the original request exactly.
application/problem+json
{
"type": "https://masnet.com/developers/errors/idempotency_conflict",
"title": "Idempotency key reused",
"status": 409,
"detail": "...",
"code": "idempotency_conflict",
"correlation_id": "..."
}