Error on switching from non-existent NetVM

[bnvk]

I just restored my system from using backups to Qubes 3.1 RC2 and in doing this I didn't restore any of my old Whonix NetVMs instead opting for the new auto-generated templates. I tried assigning my new NetVM to one of my AppVMs that had nothing set, and the following error popped up:

libvirtError: virDomainLookupByName() failed

This is most likely a bug in the Qubes Manager

In the details was the following:

----
line: if ret is None:raise libvirtError('virDomainLookupByName() failed', conn=self)
func: lookupByName
line no.: 4066
file: /usr/lib64/python2.7/site-packages/libvirt.py
----
line: self._libvirt_domain = vmm.libvirt_conn.lookupByName(self.name)
func: libvirt_domain
line no.: 756
file: /usr/lib64/python2.7/site-packages/qubes/modules/000QubesVm.py
----
line: if not self.libvirt_domain.isActive():
func: get_mem
line no.: 773
file: /usr/lib64/python2.7/site-packages/qubes/modules/000QubesVm.py
----
line: lambda v, val: v.get_mem() / 1024,
func: <lambda>
line no.: 183
file: /usr/lib64/python2.7/site-packages/qubesmanager/main.py
----
line: self.value = self.update_func(vm, load)
func: update_load
line no.: 422
file: /usr/lib64/python2.7/site-packages/qubesmanager/table_widgets.py
----
line: self.update_load(vm, load)
func: __init__
line no.: 417
file: /usr/lib64/python2.7/site-packages/qubesmanager/table_widgets.py
----
line: vm, 0, self.mem_graph_hue)
func: __init__
line no.: 184
file: /usr/lib64/python2.7/site-packages/qubesmanager/main.py
----
line: vm_row = VmRowInTable(vm, row_no, self.table, self.blk_manager)
func: fill_table
line no.: 646
file: /usr/lib64/python2.7/site-packages/qubesmanager/main.py
----
line: self.fill_table()
func: update_table
line no.: 735
file: /usr/lib64/python2.7/site-packages/qubesmanager/main.py