title: Kohana ORM - Duplicate instance / db entry
body: <p>I'd like to "duplicate" an ORM object and then save it into the database (with a new primary key), but I am not able to unset the primary key of the copied object.</p>
  
  <pre><code>    $orm1 = new Model1($id);
      if($orm1-&gt;loaded()) {
       $orm2 = $orm1;
       $orm2-&gt;id = null; //something like this?
       unset($orm2-&gt;_primary_key); //or like this?
       $orm2-&gt;save(); //I would like to create a new entry in the db but it doesn't work
      }
  </code></pre>
  
  <p>I hope I am clear enough... Basically, how can I "save again" a model in the db...?</p>