title: Firestore UPDATE a single field but creates another node
body: <p>I am updating a single field name, which is "name", I am successful on editing it, but it creates another node. like this <a href="https://i.stack.imgur.com/lfVee.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lfVee.png" alt="I only want it to be Name: &quot;Christian&quot; not Name: &quot;Name&quot;: &quot;Christian&quot;"></a></p>
  
  <p>This is my <strong>Code:</strong> </p>
  
  <pre><code>const user = firebase.auth().currentUser;
      let uid;
      if (user != null) {
        uid = user.uid;
        const db = firebase.firestore();
        const docRef = db.collection('users').doc(uid);
        docRef.update({
          name,
          timestamp: firebase.firestore.FieldValue.serverTimestamp()
        }).then(() =&gt; {
          console.log('Profile Successfully Edited!');
        }).catch((error) =&gt; {
          console.log('Error updating the document:', error);
        })
      }
  </code></pre>