title: VirtualBox Cannot register the hard disk already exists
body: <p>I created a virtual disk file <em>VM_1_Ubuntu.vdi</em>. Then I moved it into another folder. I tried to update VM settings (right click on virtual machine -> settings -> Storage -> Controller SATA tab, <em>VM_1_Ubuntu.vdi</em> path). I wanted to set a new path.</p>
  
  <p>It says
  Cannot register the hard disk already exists</p>