diff --git a/installer/data/mysql/atomicupdate/Bug_23416_add_PreserveSerialNotes_pref.perl b/installer/data/mysql/atomicupdate/Bug_23416_add_PreserveSerialNotes_pref.perl
index 751739f74f..96e321eb59 100644
--- a/installer/data/mysql/atomicupdate/Bug_23416_add_PreserveSerialNotes_pref.perl
+++ b/installer/data/mysql/atomicupdate/Bug_23416_add_PreserveSerialNotes_pref.perl
@@ -1,7 +1,7 @@
 $DBversion = 'XXX';
 if( CheckVersion( $DBversion ) ) {
     $dbh->do(q|
-        INSERT INTO systempreferences ( `variable`, `value`, `options`, `explanation`, `type` ) VALUES
+        INSERT IGNORE INTO systempreferences ( `variable`, `value`, `options`, `explanation`, `type` ) VALUES
         ('PreserveSerialNotes','1','','When a new "Expected" issue is generated, should it be prefilled with last created issue notes?','YesNo');
     |);