title: Entity framework , many changes missing after applying all migrations successfully,
body: <p><code>get-migrations</code> shows full list of all my migrations but only half of them is in the _MigrationHistory and the database has changes from these half of them. No errors , all migrations applied successfully.</p>
  
  <blockquote>
    <p>issue comes while applying migrations having int to float changes were i had to manually add 
    <code>Sql("ALTER TABLE xxx DROP CONSTRAINT DF__TBL_OPRTN__OPRTN__6497E884");</code> .
    <br></p>
  </blockquote>
  
  <p><strong>Is there any possible reason for these kind of behaviour from ef , any way to debug this?</strong></p>
  
  <p>thanks</p>