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Description of problem:
After adding the epel-7 repository in a recent RHEL 8.1.0 compose (from Beaker), subsequent 'simple' commands fail with the following error message:

failed to open: /var/cache/dnf/epel-2b6dfc5904c26562/repodata/b9eef87c2326e4489b5dacaaa83a268a125c2ac9367638c04e5485dd3aaf4470-updateinfo.xml.zck

Version-Release number of selected component (if applicable):
[root@intel-brickland-02 ~]# dnf --version
4.2.6
  Installed: dnf-0:4.2.6-1.el8.noarch at Wed 12 Jun 2019 15:36:41 GMT
  Built    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla> at Mon 13 May 2019 13:12:19 GMT

  Installed: rpm-0:4.14.2-20.el8.x86_64 at Wed 12 Jun 2019 15:36:18 GMT
  Built    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla> at Thu 06 Jun 2019 05:43:52 GMT


How reproducible:
Always

Steps to Reproduce:
1.  dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
2. dnf update (for example)

Actual results:


Expected results:
That should just work as it did before IMO

Additional info:

I believe that the bug is related to: https://bugzilla.redhat.com/show_bug.cgi?id=1726141

*** Bug 1737160 has been marked as a duplicate of this bug. ***

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:3583