Copy an existing virtual machine and register it to VirtualBox with the same UUID, error message: which has the same UUID as an existing virtual machine.
which has the same UUID as an existing virtual machine.
Workaround (my VirtualBox version: 6.1).
cmd switch to the VirtualBox installation directory and enter.
C:\Program Files\Oracle\VirtualBox>VBoxManage internalcommands sethduuid "E:\VirtualBox\ubuntu 20.04\ubuntu 20.04.vdi"