dnf system-upgrades wants to remove the running kernel

Wednesday, 23 November 2016

I'm trying to upgrade to F24 from F23.

# dnf system-upgrade download --releasever=24
Last metadata expiration check: 0:10:02 ago on Wed Nov 23 18:52:12 2016.
Error: cannot install both kernel-PAE-4.5.5-300.fc24.i686 and
kernel-PAE-4.7.10-100.fc23.i686
(try to add '--allowerasing' to command line to replace conflicting packages)

kernel-PAE-4.7.10-100.fc23.i686 is actually the one that's running
(and in fact the only one).

With --allowerasing I get

[...]
Removing:
 kernel-PAE                 i686   4.7.10-100.fc23                @updates

Allowing dnf to do this seems a bit risky to me.

What's the real problem that makes dnf complain? (The error message is
not very helpful: dnf shouldn't try to install
kernel-PAE-4.7.10-100.fc23.i686, as it is installed already.) And how
do I work around it?

Thanks,

Andras