title: Delete one of the question_id from following schema
body: <p>I have a following schema and I want to delete one of the <code>question_id</code> from following schema:</p>
  
  <p><a href="https://i.stack.imgur.com/96bYy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/96bYy.png" alt="enter image description here"></a></p>
  
  <p>I used following query:</p>
  
  <pre><code>db.getCollection('test').update(
      { },
      { $pull: { sections:{ questions_ids: "SzaGcEr8oZ7fEsrC3} } }
  )
  </code></pre>
  
  <p>But this query is not updating anything and when I used <code>multi:true</code> then it is deleting whole section. Please update me where I am doing wrong.</p>