title: Why there exists a selection with empty description in my pivot table?
body: <p><a href="https://i.stack.imgur.com/TOj4u.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/TOj4u.png" alt="enter image description here" /></a></p>
  <p>As shown in the screenshot above, there exists an empty description selection box (highlighted in yellow) in my pivot table. My variable should only have N/A, Sold perfect, Sold too late and Sold too soon. May I know why it exists and what does it means? Thank you</p>