Description of problem:
Trying to modify the volume group properties to be RAID5

Version-Release number of selected component:
anaconda-20.18-1

The following was filed automatically by anaconda:
anaconda 20.18-1 exception report
Traceback (most recent call first):
  File "/tmp/updates/blivet/__init__.py", line 1948, in copy
    root.swaps = [new.devicetree.getDeviceByID(d.id) for d in root.swaps]
  File "/tmp/updates/blivet/devicefactory.py", line 767, in _save_devicetree
    _blivet_copy = self.storage.copy()
  File "/tmp/updates/blivet/devicefactory.py", line 704, in configure
    self._save_devicetree()
  File "/tmp/updates/blivet/__init__.py", line 1924, in factoryDevice
    factory.configure()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1069, in _replace_device
    new_device = self.__storage.factoryDevice(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1362, in _save_right_side
    selector=selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2400, in _save_current_selector
    self._save_right_side(self._current_selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2411, in on_selector_clicked
    self._save_current_selector()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/lib/accordion.py", line 216, in _onSelectorClicked
    cb(selector)
AttributeError: 'NoneType' object has no attribute 'id'

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=/ppc/ppc64/vmlinuz ro inst.vnc inst.sshd ip=9.5.114.36::9.5.114.1:255.255.255.0:sharpie.rch.stglabs.ibm.com:eth0:none nameserver=9.10.244.100 bootdev=eth0 live.updates=http://chukar.rch.stglabs.ibm.com/updates-ppc64le.img
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.11.0-300.fc20.ppc64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        20