Upgrading from RHEL 7.9 to RHEL 8.x failed

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Hello,

I'm trying to upgrade one of our test systems from RHEL 7.9 to 8.x version using Leapp. I have successfully resolved Leapp preupgrade errors but when I execute "leapp upgrade" command fails with the following errors:

STDERR:
Warning: Packages marked by Leapp for install not found in repositories metadata: python3-nss ldns-utils rpcgen python3-pyxattr gdk-pixbuf2-xlib ivy-local python3-javapackages libnsl2-devel rpcsvc-proto-devel
Warning: Packages marked by Leapp for upgrade not found in repositories metadata: gpg-pubkey
RPM: warning: Generating 6 missing index(es), please wait...
Error: Transaction test error:
  file /usr/lib/python2.7/site-packages/ipaddress.py from install of python2-ipaddress-1.0.18-6.module+el8.1.0+3111+de3f2d8e.noarch conflicts with file from package python-ipaddress-1.0.16-2.el7.noarch
  file /usr/lib/python2.7/site-packages/ipaddress.pyc from install of python2-ipaddress-1.0.18-6.module+el8.1.0+3111+de3f2d8e.noarch conflicts with file from package python-ipaddress-1.0.16-2.el7.noarch
  file /usr/lib/python2.7/site-packages/ipaddress.pyo from install of python2-ipaddress-1.0.18-6.module+el8.1.0+3111+de3f2d8e.noarch conflicts with file from package python-ipaddress-1.0.16-2.el7.noarch
DS

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