title: Code First Migration failing
body: <p>I followed this <a href="http://www.ladislavmrnka.com/2012/03/ef-4-3-migrations-and-existing-database/" rel="nofollow">tutorial</a></p>
  
  <p>And then did </p>
  
  <pre><code>Update-Database -Force -Verbose
  </code></pre>
  
  <p>It showed that it upgraded the table.
  However an error is shown:</p>
  
  <pre><code>The model backing the 'DbConnection' context has changed 
  since the database was created.
  Consider using Code First Migrations to update the database
  (http://go.microsoft.com/fwlink/?LinkId=238269).
  </code></pre>
  
  <p>I also tried</p>
  
  <pre><code>Enable-Migrations -ContextTypeName MvcApplication6.Models.DbConnection
  </code></pre>
  
  <p>However it says:</p>
  
  <pre><code>Migrations have already been enabled in project 'MvcApplication6'. 
  To overwrite the existing migrations configuration, use the -Force parameter.
  </code></pre>
  
  <p>Any ideas what I did wrong?</p>