receptionist_connections_update_failed
Stripe definitively refused the connection change. The local count is unchanged, the reserved receptionist lane admits exactly what it admitted before, and the detail carries Stripe's refusal.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/receptionist_connections_update_failed",
"title": "…",
"status": 502,
"detail": "…",
"instance": "/v1/…"
}