title: Magento 1.9.x - How to update customer id in a order
body: <p>I am working with Magento CE 1.9.x and my current website is running on Magento CE 1.4.x</p>
  
  <p>After data migration,customer id is missing in every order.</p>
  
  <p>Now i want to update customer ID in order, how can i do that ?</p>
  
  <p>any ideas ?</p>