title: TYPO3 set uid to new model
body: <p>Simple question: how to set uid to new model? TYPO3 8.7.17. 
  I tried adding method</p>
  
  <pre><code>public function setUid($uid)
  {
     $this-&gt;uid = $uid;
  }
  </code></pre>
  
  <p>I assume I am creating a custom extension and I want to save the uid in a new model
  But model not saving. I know it is not recommend. But I have causes why I need it.</p>
  
  <p>I need id because user make import of data from csv every day. And I have relative data. When user make import uids are changing. I can't assign the date as well.</p>