Apache2::Reload, Prototype mismatch

Hello,

I use Apache2::Reload on my dev env :
PerlModule Apache2::Reload
PerlInitHandler Apache2::Reload
PerlSetVar ReloadDirectories "/d/"

It works perfectly.
Of course I get the warnings "Subroutine redefined" when modules are reloaded.

But I also get :
Prototype mismatch: sub Functions::to_json: none vs ($@) at /d/Mod.pm line 6.
Prototype mismatch: sub Functions::from_json: none vs ($@) at /d/Mod.pm line 6.
Prototype mismatch: sub Functions::sha256_hex: none vs (;@)
 at /usr/local/lib/perl5/5.24/Exporter.pm line 66.
 at /d/Mod.pm line 9.
Prototype mismatch: sub Functions::from_to: none vs ($$$;$)
 at /usr/local/lib/perl5/5.24/Exporter.pm line 66.
 at /d/Mod.pm line 11.

Mod.pm :
1.  package Functions;
2.  use strict;
3.  use warnings;
4.  use Exporter qw(import);
5.  our @EXPORT_TO = qw(func1 func2 func3);
6.  use JSON qw(to_json from_json);
7.  use Cache::Memcached;
8.  use DBI;
9.  use Digest::SHA qw(sha256_hex);
10. use MIME::Types;
11. use Encode qw(from_to);

Should I pay attention to these errors ?
How to properly solve them ?

Thank you very much !

Best regards,

Ben