Have you tried 
o conf show_unparsable_versions

[download]
and rerunning the r command?

On my machine, there are 526 such modules. Most of them seem to be helper (sub)modules in distributions, not installable without the main module, e.g. 

Module  < Test::Deep::Methods    (RJBS/Test-Deep-1.205.tar.gz)
Module  = App::Ack::Filter::Collection (PETDANCE/ack-v3.9.0.tar.gz)
Module  = Plack::Handler::HTTP::Server::PSGI (MIYAGAWA/Plack-1.0051.ta
+r.gz)

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while some others are really weird, e.g. 
Module  = overload::numbers      (BOOK/perl-5.42.0.tar.gz)

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(I'm running this in 5.26.1 and I don't have 5.42.0 installed: I use 5.43.0 instead when experimenting with the new stuff). Update: The message probably shows the latest version at CPAN, which is 5.42.0. The module itself doesn't define a version: 
$ perl -Moverload::numbers\ 999 -e1
overload::numbers does not define $overload::numbers::VERSION--version
+ check failed.
BEGIN failed--compilation aborted.

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map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: Package VERSIONs not parseable by the cpan module by choroba
in thread Package VERSIONs not parseable by the cpan module by Intrepid

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