Somehow my Vagrant project has disassociated itself from its VirtualBox VM, so that when I vagrant up Vagrant will import the base-box and create a new virtual
Update with same problem today with Vagrant 1.7.4:
For example, to pair box 'vip-quickstart_default_1431365185830_12124' to vagrant.
$ VBoxManage list
"vip-quickstart_default_1431365185830_12124" {50feafd3-74cd-40b5-a170-3c976348de27}
$ echo -n "50feafd3-74cd-40b5-a170-3c976348de27" > .vagrant/machines/default/virtualbox/id