=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/startup/TableAlteror.java'
--- dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/startup/TableAlteror.java	2014-01-21 06:32:43 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/java/org/hisp/dhis/startup/TableAlteror.java	2014-01-21 07:07:30 +0000
@@ -680,6 +680,9 @@
         executeSql( "UPDATE attribute SET usergroupattribute=false WHERE usergroupattribute IS NULL" );
         executeSql( "UPDATE attribute SET datasetattribute=false WHERE datasetattribute IS NULL" );
 
+        // update attribute.code, set to null if code=''
+        executeSql( "UPDATE attribute SET code=NULL WHERE code=''" );
+
         upgradeDataValuesWithAttributeOptionCombo();
         upgradeMapViewsToAnalyticalObject();