title: Forbidden: field can not be less than previous value
body: <p>I got a problem on Azure that the Nexus didn't had enough disk space. Nexus failed to start due to this problem so I extended the default PVC jenkins-x-nexus from 8GB to 20GB. This extension was successful and everything is just running file.</p>
  
  <p>But if I now want to upgrade my jx platform (jx upgrade platform) I'm getting the following error:</p>
  
  <p>The PersistentVolumeClaim "jenkins-x-nexus" is invalid: spec.resources.requests.storage: Forbidden: field can not be less than previous value'</p>
  
  <p>How can this be resolved?</p>
  
  <p>The PersistentVolumeClaim "jenkins-x-nexus" is invalid: spec.resources.requests.storage: Forbidden: field can not be less than previous value'</p>