alternatives is forgetful?

[Tom Horsley]

I've always set my emacs alternatives to lucid emacs. Today I
did a big dnf update, rebooted to get new kernel, and then got
an error when I started emacs about the "pure GTK" version
not operating correctly under X11 (one of the reasons I use
lucid).

Why did my alternatives config setting revert?

Anyway, I've now removed all versions except lucid. Maybe
that will make it stick :-).