What to do when object on realm gets invalidated

In my iOS app I am using the Realm library for storing data. It works great, until for one reason or the other, object get invalidated. (reasons in the specific case could be that I sometimes implement background jobs on the same data that are getting visualized on view, or similar scenarios).

I know why it happens, and I understand is correct behavior but from there on: what is the correct behavior I should implement?

I would love to pull the data from Realm again and continue my job, but when an object gets invalidated, every field is inaccessible and crashes the environment (so, I don't know what is the unique+immutable id of the object).

How can I safely pull the current data from that object again, without storing the id in the ViewController?

Here is some code. I had to edit it heavily to since the structure of the app is different, but the issue is still exemplified. Assume that the table view delegate's is the view and all the technicalities are there.

// A class variable
var events: RLMResults<RLMMyEvent>
// A table view that shows all "MyEvents"
var tableview: UITableView

func initialiseView(_ predicate: NSPredicate) {
  // Get the events with a predicate from Realm
  events = RLMMyEvent.objects(with: predicate)
  tableview.reloadData()
}

// All tableView delegates, and in particular

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
   let cell = tableView.dequeueReusableCell(withIdentifier: reuseIdentifier, for: indexPath) as! MyCell

   let event = self.events[UInt(indexPath.row)]

   if !event.isInvalidated {
   } else {

   /***** HERE is the problem. What to do here?
          HOW to get those data again, since I cannot 
          get that event's unique ID?  ****/
   }
   cell.initialize(event)
   return cell
}

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