- my $query = qq|SELECT ${reference_date} + terms_netto FROM payment_terms WHERE id = ?|;
- my ($duedate) = selectrow_query($self, $dbh, $query, $payment_id);
+ if ($payment_id) {
+ my $query = qq|SELECT ${reference_date} + terms_netto FROM payment_terms WHERE id = ?|;
+ ($duedate) = selectrow_query($self, $dbh, $query, $payment_id);
+ }