Error loading PCI Device... Can anyone explain why this is having kittens?

[Drew White]

What is going on here?
Please help?

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[{username}@dom0 {drive_id}]$ qvm-start TSTester --cdrom=/run/media/{username}/{drive_id}/isos/opsys1/opsys1_2.iso
--> Loading the VM (type = HVM)...
Traceback (most recent call last):
File "/usr/bin/qvm-start", line 131, in <module>
main()
File "/usr/bin/qvm-start", line 115, in main
xid = vm.start(verbose=options.verbose, preparing_dvm=options.preparing_dvm, start_guid=not options.noguid, notify_function=tray_notify_generic if options.tray else None)
File "/usr/lib64/python2.7/site-packages/qubes/modules/01QubesHVm.py", line 326, in start
return super(QubesHVm, self).start(*args, **kwargs)
File "/usr/lib64/python2.7/site-packages/qubes/modules/000QubesVm.py", line 1893, in start
nd.dettach()
File "/usr/lib64/python2.7/site-packages/libvirt.py", line 5249, in dettach
if ret == -1: raise libvirtError ('virNodeDeviceDettach() failed')
libvirt.libvirtError: Requested operation is not valid: PCI device 0000:06:00.0 is in use by driver xenlight, domain TSTester
[{username}@dom0 {drive_id}]$
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