diff --git a/C4/Biblio.pm b/C4/Biblio.pm
index 19e1e14966..808955dab8 100644
--- a/C4/Biblio.pm
+++ b/C4/Biblio.pm
@@ -3026,7 +3026,7 @@ sub _koha_marc_update_bib_ids {
         # drop old field and create new one...
         $old_field = $record->field($biblio_tag);
         $record->delete_field($old_field) if $old_field;
-        $record->append_fields($new_field);
+        $record->insert_fields_ordered($new_field);
 
         # deal with biblioitemnumber
         if ( $biblioitem_tag < 10 ) {
@@ -3442,7 +3442,7 @@ sub ModBiblioMarc {
         }
         substr( $string, 22, 6, "frey50" );
         unless ( $record->subfield( 100, "a" ) ) {
-            $record->insert_grouped_field( MARC::Field->new( 100, "", "", "a" => $string ) );
+            $record->insert_fields_ordered( MARC::Field->new( 100, "", "", "a" => $string ) );
         }
     }