Error:
The VirtualBox was created with a user that doesn't match the current user running Vagrant. VirtualBox requires the same user be used to manage the vM that was created. Please re-run vagrant with that user. This is not a Vagrant issue.
Your UID: x
Solution:
go to .vagrant/machines/web/virtualbox/creator_uid and set the value to your UID.
Error:
A VirtualBox machine with the name "name" already exists. Please use another name or delete the machine with the existing name, and try again.
Solution:
vboxmanage list vms
Output:
"my-vm" {c700b8b6-b766-4638-871b-736b44b7db18}