anchor.diff:          {ok, [Cur|_]} ->
               update_storage_node_status(
                 update, Cur#node_state{ring_hash_new = RingHash0,
  -                                     ring_hash_old = RingHash1,
  -                                     when_is       = leo_date:now()});
  +                                     ring_hash_old = RingHash1});
           _ ->
               ok
       end;
  
positive.code:     #node_state{node = Node, state = State} = NodeState,
      case get_storage_node_by_name(Node) of
          {ok, [Cur|_]} ->
              update_storage_node_status(
                update, Cur#node_state{state   = State,
                                       when_is = leo_date:now()});
          _ ->
              ok
      end;
  
negative.code:     #node_state{node  = Node} = NodeState,
      case get_storage_node_by_name(Node) of
          {ok, [Cur|_]} ->
              update_storage_node_status(update, Cur);
          _ ->
              ok
      end;
  