admin_mutation_unmapped
This code is raised on a non-customer surface (the /internal voice-runtime audience or telephony provider callbacks). It is excluded from the customer OpenAPI document and is registered here so an operator reading a log line has one place to look.
A mutating /admin route declared no action id. A server fault by construction, never the caller's: the boot-time route scan should have refused to start the process, so reaching this at request time means the scan was bypassed. The failure it guards has no symptom - an endpoint that works correctly and records nothing.
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/admin_mutation_unmapped",
"title": "…",
"status": 500,
"detail": "…",
"instance": "/v1/…"
}