invite_live_target_occupied· reason_code· applies to event_envelope, auth_decisionSub-reason for failed_precondition when ak.invite.create targets an account whose Realm live-target slot invite_live_target is already claimed by another live directed Invite. The Event is not accepted, enters no canonical history and derives no typed current result write; the closed error.details is InviteLiveTargetOccupiedProblem carrying the occupying invite_id and create_event_id. See zh/models/governance-objects.md section 5.3.