Adding See also to bugs

[rojanu]

Hi I am writing a class to import bugs from a bug tracker

I need to update the see also field of the bugs, I have

foreach my $ids (@$result){
my ($bug_id, $see_also) = @$ids;
my $bug = Bugzilla::Bug->check($bug_id);
if(!@{$bug->see_also}){
$self->debug("Linking Bugs: $bug_id <-> $see_also");
my %set_all_fields;

$set_all_fields{who} = $self->config('default_assignee');
$set_all_fields{see_also}->{add} = [$see_also];

$bug->set_all(\%set_all_fields);
$bug->update();
}

But this fields are not enough to update the bug as the DB constraints are not satisfied. What other fields do I need?

Thanks,
rojanu