# sometimes it happens that values in customer arrive without the signs '--'
# but in order to select the right option field we need values with '--'
- if ($form->{vc} eq "customer"){
+ if ($form->{vc} eq "customer" && $form->{"all_$form->{vc}"}){
my ($customername) = split /--/, $form->{ $form->{vc} };
$form->{ $form->{vc} } = $customername . "--" . $form->{customer_id};
}