$others{$id}{rank} = $rank;
$others{$id}{name} = $name;
$others{$id}{id} = $id;
$others{$id}{alter} = $alter;

$members{$id}{name} = $name;
$members{$id}{id} = $id;
$members{$id}{alter} = $alter;

foreach $hashref (\%hash1,\%hash2) {
    while (($k,$v)=each $%hashref) {
       if (exists $hash1u2{k}) { #kann man ja noch beliebig erweitern die bedingung
           next; #verwerfe den eintrag
       }
       $hash1u2{$k}=$v;
    }
}