diff --git a/superx/WEB-INF/conf/edustore/db/conf/build.xml b/superx/WEB-INF/conf/edustore/db/conf/build.xml
index b5a25d1..37909de 100644
--- a/superx/WEB-INF/conf/edustore/db/conf/build.xml
+++ b/superx/WEB-INF/conf/edustore/db/conf/build.xml
@@ -576,10 +576,10 @@ xmlns:HtmlUtils="de.superx.util.HtmlUtils">
    </target> 
    
    <target name="add_files_nd_his1" if="isNdModuleAndIsPlatformHIS1"> 
-   <!--rpta,etl,viz benötigt unter HIS1 ein paar Stylesheets von SuperX-KERN-Standalone 5.2-->
+   <!--rpta,etl,viz benötigt unter HIS1 ein paar Stylesheets von SuperX-KERN-Standalone 5.3-->
    <property name="MODULE_DIR" value="../module/${MODULE}" />
    <xmlproperty file="${MODULE_DIR}/conf/${MODULE}.xml"/>
-    <property name="KERN_DEPENDENT_URL" value="https://git.campussource.de/git/SuperX/kern/raw/branch/RELEASE_kern5.2/superx" />
+    <property name="KERN_DEPENDENT_URL" value="https://git.campussource.de/git/SuperX/kern/raw/branch/RELEASE_kern5.3/superx" />
 	
    <property name="ZIELPFAD" value="${PFAD}/${MODULE}${module(version)}_${PLATFORM}_${ENCODING}_${DATABASE}"/>
    <echo message="Modul ${MODULE} Version ${module(version)} in Pfad ${ZIELPFAD} mit Encodierung ${ENCODING} erzeugen." />
diff --git a/superx/WEB-INF/conf/edustore/db/install/upgrade/kernmodul_upgrade_man.sql b/superx/WEB-INF/conf/edustore/db/install/upgrade/kernmodul_upgrade_man.sql
index 6d36576..e4bc31f 100644
--- a/superx/WEB-INF/conf/edustore/db/install/upgrade/kernmodul_upgrade_man.sql
+++ b/superx/WEB-INF/conf/edustore/db/install/upgrade/kernmodul_upgrade_man.sql
@@ -190,3 +190,7 @@ where T.tid !=T.richtig);
 
 drop table tmp_dummy;
 
+--obsolete Zeilen weg:
+delete from sachgeb_maske_bez where maskeninfo_id is null;
+
+