title: Magento - Change the quote_id after login
body: <p>I'm adding products to my cart while I'm not logged in. My <code>quote_id is 597</code>.</p>
  
  <p>In the checkout process I'm logging in (in the first step) and I've noticed that my quote has changed.</p>
  
  <p><code>quote_id 597</code> has disappeared from database and the new <code>quote_id is now 555</code>.</p>
  
  <p>What's the observer,class and method that are in charge of this quote change, as I have a temporary table in the database where I also need to modify that <code>quote_id</code>?</p>