=== modified file 'dhis-2/dhis-services/dhis-service-core/src/main/resources/org/hisp/dhis/datavalue/hibernate/DataValueAudit.hbm.xml'
--- dhis-2/dhis-services/dhis-service-core/src/main/resources/org/hisp/dhis/datavalue/hibernate/DataValueAudit.hbm.xml	2015-12-01 04:59:42 +0000
+++ dhis-2/dhis-services/dhis-service-core/src/main/resources/org/hisp/dhis/datavalue/hibernate/DataValueAudit.hbm.xml	2016-02-23 11:32:53 +0000
@@ -27,7 +27,7 @@
 
     <property name="value" length="50000" />
 
-    <property name="created" column="created" type="timestamp" not-null="true" index="id_datavalueaudit_created" />
+    <property name="created" column="created" type="timestamp" not-null="false" index="id_datavalueaudit_created" />
 
     <property name="modifiedBy" column="modifiedby" length="100" />