Description of problem:
Not sure of sequence:  selected single 3TB disk, custom and btrfs.  In partitioner I had a pre-made empty btrfs partition which I tried to reuse and of course it wouldn't allow it.  Clicked done anyway as I wanted to look at selections in the software dialogue knowing that I had to go back and create a partition.  Started back thru to partitioner and was taken to disk selection screen.  No disks highlighted so I clicked the 3TB disk and after clicking done was told no disks selected so back to disk selection and clicked 3TB again and it was highlighted.  Clicked done and selected custom and btrrs again.  Into paritioner and it had shrunk to a smallish rectangle in upper left of screen, however, deleted the preexisting btrfs partition and created a new partition same size same name.  Clicked update and screen froze.  Clicked around with no result and sat back waiting.  Eventually this error occurred.
The following was filed automatically by anaconda:
anaconda 19.23-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 1175, in __init__
    super(BTRFSFactory, self).__init__(storage, size, disks, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 97, in get_device_factory
    return factory_class(blivet, size, disks, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1875, in factoryDevice
    **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 957, in _replace_device
    new_device = self.__storage.factoryDevice(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1237, in _save_right_side
    selector=selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2624, in on_apply_clicked
    self._save_right_side(self._current_selector)
TypeError: __init__() got an unexpected keyword argument 'container_raid_level'

Version-Release number of selected component:
anaconda-19.23-1

Additional info:
cmdline:        /usr/bin/python  /sbin/anaconda
cmdline_file:   initrd=initrd.img inst.stage2=hd:UUID=afbcf488-11c6-4c3c-8c51-f8ef83d1920a  BOOT_IMAGE=vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         3.9.0-0.rc8.git0.2.fc19.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        19-Beta-TC2

Truncated backtrace:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 2624, in on_apply_clicked
    self._save_right_side(self._current_selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 1237, in _save_right_side
    selector=selector)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/ui/gui/spokes/custom.py", line 957, in _replace_device
    new_device = self.__storage.factoryDevice(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/__init__.py", line 1875, in factoryDevice
    **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 97, in get_device_factory
    return factory_class(blivet, size, disks, **kwargs)
  File "/usr/lib/python2.7/site-packages/blivet/devicefactory.py", line 1175, in __init__
    super(BTRFSFactory, self).__init__(storage, size, disks, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'container_raid_level'