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The abrt python2 subpackages are no longer built for Rawhide since https://src.fedoraproject.org/rpms/abrt/c/4f98a322c2469e567bc73ec240a745937241c5f7?branch=master , but they are not obsoleted by anything. This breaks upgrades unless --allowerasing is used. Removed packages should be properly obsoleted.
There is a discussion on fpc's issue tracker about the best way to go about that, please add your feedback there [0]. [0] https://pagure.io/packaging-committee/issue/754
How looks the upgrade error?
I don't have the exact errors any more (as I used --allowerasing, and dnf history doesn't seem to log this kind of case), but basically it fails because the upgrade transactions wants to install the newer versions of abrt, abrt-dbus and abrt-libs, but the old python2-abrt - which it has no reason to remove - wants the *old* versions. Passing '--allowerasing' tells dnf, in this kind of situation, to just remove any older package whose deps cannot be satisfied...which lets you get around this problem, but it's kind of a dangerous option as it can potentially cause something else you *didn't* want removed to be removed.
Done by https://bugzilla.redhat.com/show_bug.cgi?id=1578359