Meteor collection-revisions error

Question

I'm using the collection-revisions package on Meteor to display all changes made in a collection.

However, I'm having some issues to restore previous changes. I'm getting an error: Uncaught Error: Match error: Expected string, got undefined.

I'm using the following event (similar to the documentation's example, actually):

Template.edit.events({
  'click .revert': function(e, t) {
    var edit;
    edit = Template.parentData();
    return CollectionRevisions.restore('Edits', edit._id, this.revisionId);
  }
});

Any ideas on what I'm doing wrong here?