Use Schema.org for Article without image property?
<p>I have implemented Schema.org in my project, I have added <code>Article</code> section but we did not have <code>image</code> so it shows an error </p>

<blockquote>
  <p>A value for the image field is required.</p>
</blockquote>

<p>How can I fix this error and is there any solution for using <code>Article</code> without <code>image</code> section?</p>