title: How to delete a migration using sequalize-cli
body: <p>I manually deleted a migration file name <code>20171125081136-create-task.js</code>.</p>
  
  <p>After deleting the migration file, I ran this command </p>
  
  <pre><code>db:migrate:undo:all
  </code></pre>
  
  <p>While running this command I'm getting an error in the terminal:
  <code>ERROR: Unable to find migration: 20171125081136-create-task.js</code>.</p>
  
  <p>Due to this error I'm stuck and not able to undo other migration files that exists.</p>