从nstore_fd还原时出错:无法通过包“hash::case::lower”找到对象方法“firstkey”

我在做一个2005年的考古项目。它一直很高兴地编写这样的备份:

use Storable qw(nstore_fd);  
my %data = 
    (
     "Games" => \%Games,
     "Members" => \%Members,
     "Scenarios" => \%Scenarios,
     "Passwords" => \%Passwords,
     "TourneyNames" => \%TourneyNames
     );

    nstore_fd(\%data, *BACKUP) or die "Can't write backup: $!";

我需要恢复一些数据。

我做到了:

use Storable qw(fd_retrieve); 

$data = fd_retrieve(*STDIN);  # the backup file 

print keys %{$data}, "\n";

foreach $thing (keys(%{$data})) {
    print "$thing\n";
    print scalar keys %{$data->{$thing}}, "\n";
}

得到:

$ perl ~/foo.pl < BobsterBackup2018-7-9-35131.bak
GamesMembersPasswordsScenariosTourneyNames
Games
15556
Members
Can't locate object method "FIRSTKEY" via package "Hash::Case::Lower" at /Users/mgregory/foo.pl line 9.
$ 

我看到原始来源有:

tie %Members, 'Hash::Case::Lower';    # index by non-case-sensitive member-name.

…但我不知道该怎么办!