payload topic undefined

[dsl400]

my humble oppinnion is that subscription is deleted before the node.send finishes

 broker.on('subscribe', function (subscription, client) {
      console.log(subscription) >>>>>> [{ topic: 'db/client-ek2jasyss8r/repo/7c8c7f0e-1b4d-4822-9f95-52a6a079a3e6',qos: 1 }]
      const msg = {
        topic: 'subscribe',
        payload: {
          topic: subscription.topic,
          qos: subscription.qos,
          client
        }
      };
      node.send([msg, null]);
    });