I needed to coordinate photos from three cameras with three different clock settings - one was correct, one an hour ahead, and one 2 hours ahead. I used similar code, but many pictures failed to update with a "Maker offsets" warning. The FixBase => '' option fixed that, and below is the code:

use strict;
use warnings;
use Image::ExifTool;
chdir("C:/Users/hbm/pictures/trip") or die("Unable to chdir: $!");

my $tool    = Image::ExifTool->new();
$tool      -> Options(FixBase => '');   # "best guess" for fixing Make
+r offsets

for my $jpg (glob("*.JPG")) {
   $tool      -> ExtractInfo($jpg);
   my $camera  = $tool->GetValue("Model");
   next          if $camera =~ /KODAK/i;
   
   my $shift   = ($camera =~ /SD1200/i) ? "2:00" : "1:00";
   $tool      -> SetNewValue(DateTimeOriginal => $shift, Shift => -1);
   my $success = $tool->WriteInfo($jpg);

   print "$jpg Update failed: ", $tool->GetValue('Error'), "\n"    if 
+!$success;
}
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