title: update a VIRTUAL GENERATED column
body: <pre><code>UPDATE reservation SET NB_RESTE=1 WHERE IDRESERVATION='28'
  </code></pre>
  
  <p>i want to update the NB_RESTE value but it wont work , even when i try to update another column it works properly Knowing that NB_RESTE is VIRTUAL GENERATED </p>
  
  <p>error message : </p>
  
  <blockquote>
    <p>#3105 - The value specified for generated column 'NB_RESTE' in table 'reservation' is not allowed.</p>
  </blockquote>