-<input type="hidden" name="follow_up_trans_id_1" value="[% id %]">
-<input type="hidden" name="follow_up_trans_type_1" value="sales_invoice">
-<input type="hidden" name="follow_up_trans_info_1" value="[% HTML.escape(follow_up_trans_info) %]">
-<input type="hidden" name="follow_up_rowcount" value="1">
+<input type="hidden" name="follow_up_trans_id_1" id="follow_up_trans_id_1" value="[% id %]">
+<input type="hidden" name="follow_up_trans_type_1" id="follow_up_trans_type_1" value="sales_invoice">
+<input type="hidden" name="follow_up_trans_info_1" id="follow_up_trans_info_1" value="[% HTML.escape(follow_up_trans_info) %]">
+<input type="hidden" name="follow_up_rowcount" id="follow_up_rowcount" value="1">
+<input type="hidden" name="lastmtime" id="lastmtime" value="[% HTML.escape(lastmtime) %]">
+<input type="hidden" name="already_printed_flag" id="already_printed_flag" value="0">
+<input type="hidden" name="has_qr_reference" id="has_qr_reference" value="[% has_qr_reference %]">
+[%- IF qr_reference %]
+[% L.hidden_tag("qr_reference", qr_reference) %]
+[%- END %]
+[% IF !id %]
+[% L.hidden_tag('form_validity_token', form_validity_token) %]
+[% END %]
+[% L.hidden_tag('email_journal_id', email_journal_id) %]
+[% L.hidden_tag('email_attachment_id', email_attachment_id) %]
+[% L.hidden_tag('workflow_email_journal_id', workflow_email_journal_id) %]
+[% L.hidden_tag('workflow_email_attachment_id', workflow_email_attachment_id) %]
+[% L.hidden_tag('workflow_email_callback', workflow_email_callback) %]