account_status_binding_rollback· reason_code· applies to account_status, service_call, state_resolutionA Station received an otherwise valid AccountStatusRecord whose binding_version is lower than the durable floor for the same Account Authority and account. The receiver MUST return failed_precondition with this reason, perform zero replica/outbox/erasure-intent writes, and MUST NOT retry the same record. See zh/identity/account-lifecycle.md §3.