Version-Release number of selected component:
anaconda-26.21.11-1

The following was filed automatically by anaconda:
anaconda 26.21.11-1 exception report
Traceback (most recent call first):
  File "/usr/lib/python3.6/site-packages/blivet/devicetree.py", line 148, in _add_device
    raise ValueError("device is already in tree")
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/helpers/partition.py", line 111, in run
    self._devicetree._add_device(device)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 306, in handle_device
    device = helper_class(self, info).run()
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 519, in _populate
    self.handle_device(dev)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 454, in populate
    self._populate()
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/blivet.py", line 271, in reset
    self.devicetree.populate(cleanup_only=cleanup_only)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 45, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/osinstall.py", line 1175, in storage_initialize
    storage.reset()
  File "/usr/lib64/python3.6/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib64/python3.6/site-packages/pyanaconda/threads.py", line 251, in run
    threading.Thread.run(self)
ValueError: device is already in tree

Additional info:
addons:         com_redhat_kdump, com_redhat_docker
cmdline:        /usr/libexec/system-python  /sbin/anaconda
cmdline_file:   initrd=Fedora26/initrd.img method=http://mirrors.kernel.org/fedora/releases/26/Workstation/x86_64/os/ modprobe.blacklist=nouveau BOOT_IMAGE=Fedora26/vmlinuz 
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.11.8-300.fc26.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        26