A python-blivet bugfix update has been released for CentOS 7.

CentOS-announce: CEBA-2020:5032 CentOS 7 python-blivet BugFix Update

CentOS Errata and Bugfix Advisory 2020:5032

Upstream details at :   https://access.redhat.com/errata/RHBA-2020:5032

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

x86_64:
ae536957e133aeb89aaad21eb5caebf2070b33547c21e967a1d51cc8ab213be4 python-blivet-0.61.15.76-1.el7_9.noarch.rpm

Source:
0afdb5eb87892c47016b2192dd6d7f8063e795bf78d543f5e38c6e366b4321c6 python-blivet-0.61.15.76-1.el7_9.src.rpm