Description of problem:
Attempting to create LVM volume in newly created volume group in blivet.

Version-Release number of selected component:
anaconda-29.24.7

The following was filed automatically by anaconda:
anaconda 29.24.7 exception report
Traceback (most recent call first):
  File "/usr/lib/python3.7/site-packages/blivetgui/blivetgui.py", line 232, in _reraise_exception
    raise type(exception)(str(exception) + "\n" + traceback)
  File "/usr/lib/python3.7/site-packages/blivetgui/blivetgui.py", line 470, in add_device
    self._reraise_exception(result.exception, result.traceback)
ValueError:  is not a valid name for this device
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/blivetgui/blivet_utils.py", line 1169, in add_device
    actions = add_function(self, user_input)
  File "/usr/lib/python3.7/site-packages/blivetgui/blivet_utils.py", line 980, in _create_lvmvg
    pe_size=user_input.advanced["pesize"])
  File "/usr/lib/python3.7/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.7/site-packages/blivet/devices/lvm.py", line 143, in __init__
    exists=exists, sysfs_path=sysfs_path)
  File "/usr/lib/python3.7/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.7/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.7/site-packages/blivet/devices/container.py", line 66, in __init__
    super(ContainerDevice, self).__init__(*args, **kwargs)
  File "/usr/lib/python3.7/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.7/site-packages/blivet/devices/storage.py", line 142, in __init__
    raise ValueError("%s is not a valid name for this device" % name)
ValueError:  is not a valid name for this device


Additional info:
addons:         com_redhat_docker, com_redhat_kdump
cmdline:        /usr/bin/python3  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=vmlinuz initrd=initrd.img inst.stage2=hd:LABEL=Fedora-S-dvd-x86_64-29 quiet
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.18.16-300.fc29.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        29

Potential duplicate: bug 1442020