Master bug#5189

I also have dilema about this, I saw and took this from  bin/otrs.RebuildTicketIndex.pl. I guess that in that case we have set Message on another place.
In Log() function we have
   my $Message  = $Param{MSG} || $Param{Message} || '???';

I'm not sure if this really works. Just in case, I'll put a message here, but I initially thought it was a good solution because I saw there.