EmberJS: Retransition to current route and reset dynamic segment

I have some routes defined like:

Router.map(function() {
      this.route('foo', function() {
         this.route('bar');
         this.route('bar', {path: 'bar/:fooid'});
      });
      // ...
});

The dynamic segment in /foo/bar/:fooid is an id that can be validated against some rules. To simplify the example, let's assume :fooid must consist of exactly 3 digits.

If an invalid value gets passed like in /foo/bar/1234567, I want reset the to url to foo/bar/.

Simplified foo.bar route:

export default Ember.Route.extend({

  model (params) {
     // If fooid is invalid, set model.fooid.isValid to false
  },

  afterModel (model, transition) {
     // If fooid is invalid...
     this.transitionTo('/foo/bar/');
  }

});

The validation process itself works but I can't get rid of the wrong :fooid parameter in the url!

If I transition to a different route it works fine.

Ember version is 2.14