title: 'Existing Job' error when storing Quartz.NET job on Azure
body: <p>How do I create adojobstore with out throwing the following error:</p>
  
  <pre><code> Unable to store job because one already exists with this identification.
  </code></pre>
  
  <p>Can I read from the database and check if the job does not exist then add it to the scheduler?
  Is that the recommended way of doing?</p>
  
  <p>Is it necessary to Shutdown the scheduler on Azure?</p>