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. Also answered when the tenant's saved payment method cannot be read from Stripe before the prepaid month is collected - nothing was charged, so telling the customer their card declined would send them to fix a card that is fine; retry the same target. As with the unconfirmed sibling, when the month was already collected the detail says so and the same target completes the purchase without a second charge.
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/…"
}