Description of problem:
selecting storage: unselected and reselected vda device, chose manual partitioning, clicked done
this is new VM with clear storage

Version-Release number of selected component:
anaconda-21.48.6-1

The following was filed automatically by anaconda:
anaconda 21.48.6-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devices.py", line 2584, in _removeLogVol
    raise ValueError("specified lv is not part of this vg")
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 450, in _removeDevice
    dev.vg._removeLogVol(dev)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 521, in cancelAction
    self._removeDevice(action.device)
  File "/usr/lib/python2.7/site-packages/blivet/devicetree.py", line 1967, in hide
    self.cancelAction(action)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 354, in _hide_unusable_disks
    self._storage_playground.devicetree.hide(disk)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 122, in decorated
    return func(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 362, in _reset_storage
    self._hide_unusable_disks()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 377, in refresh
    self._reset_storage()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 355, in _on_spoke_clicked
    spoke.refresh()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/hubs/__init__.py", line 387, in spoke_done
    self._on_spoke_clicked(self._spokes[dest].selector, None, self._spokes[dest])
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/__init__.py", line 51, in on_back_clicked
    self.main_window.current_action.spoke_done(self)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/storage.py", line 870, in on_back_clicked
    NormalSpoke.on_back_clicked(self, button)
ValueError: specified lv is not part of this vg

Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   method=http://download.englab.brq.redhat.com/pub/fedora/fedora-alt/stage/21_Alpha_RC1/Server/x86_64/os/
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.16.1-301.fc21.x86_64
product:        Fedora-Server
release:        Cannot get release name.
type:           anaconda
version:        21_Alpha

Potential duplicate: bug 1132322