bug#63757: 29.0.91 order of package paths changed: random old versions of packages in load-path

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: Philip Kaludercic <philipk@posteo.net>,  artscan@list.ru,
>   63757@debbugs.gnu.org
> Date: Sun, 04 Jun 2023 10:46:05 -0400
> 
> > OK, thanks.  Please install on emacs-29, and let's hope this doesn't
> > cause new problems.
> 
> No please don't.  It doesn't fix the problem, it just hides it a bit
> further but will still bite some users.

What do you suggest instead, that is safe enough for emacs-29?  The
only alternative I see is leave this unsolved, since the issue happens
only if someone installs new versions of packages by hand without
deleting the old versions.  Are there any other alternatives that you
see for the release branch?