+sub further_invoice_for_advance_payment {
+ my $form = $main::form;
+ my %myconfig = %main::myconfig;
+
+ $main::auth->assert('invoice_edit');
+
+ delete @{ $form }{qw(printed emailed queued invnumber invdate exchangerate forex deliverydate datepaid_1 gldate_1 acc_trans_id_1 source_1 memo_1 paid_1 exchangerate_1 AP_paid_1 storno locked)};
+ $form->{convert_from_ar_ids} = $form->{id};
+ $form->{id} = '';
+ $form->{rowcount}--;
+ $form->{paidaccounts} = 1;
+ $form->{invdate} = $form->current_date(\%myconfig);
+ my $terms = get_payment_terms_for_invoice();
+ $form->{duedate} = $terms ? $terms->calc_date(reference_date => $form->{invdate})->to_kivitendo : $form->{invdate};
+ $form->{employee_id} = SL::DB::Manager::Employee->current->id;
+ $form->{forex} = $form->check_exchangerate(\%myconfig, $form->{currency}, $form->{invdate}, 'buy');
+ $form->{exchangerate} = $form->{forex} if $form->{forex};
+
+ $form->{"converted_from_invoice_id_$_"} = delete $form->{"invoice_id_$_"} for 1 .. $form->{"rowcount"};
+
+ &display_form;
+}
+