account_status_record_stale· reason_code· applies to account_status, service_call, state_resolutionA Station received an otherwise valid AccountStatusRecord whose status_seq is lower than its durable replica head. The durable head is the only comparison baseline, so this reason applies even when the submitted record is byte-identical to a history row the receiver still stores for that status_seq; a retained history row MUST NOT downgrade the outcome to duplicate. The receiver MUST return failed_precondition with this reason, perform zero writes, and treat the exact record as terminal/non-retryable. duplicate is reserved for a submission whose status_seq and record identity both equal the durable head. The full ordered classification is registry/account-status-replica-decision-table.json. See zh/identity/account-lifecycle.md §3.1.