Index: lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/SequenceActivity.as
===================================================================
diff -u -rcd33f92df2c46dfe2e817281d501e179a6094637 -r987cb61034271852ea386a3e045463272cfb1fc5
--- lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/SequenceActivity.as	(.../SequenceActivity.as)	(revision cd33f92df2c46dfe2e817281d501e179a6094637)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/authoring/SequenceActivity.as	(.../SequenceActivity.as)	(revision 987cb61034271852ea386a3e045463272cfb1fc5)
@@ -63,8 +63,7 @@
 	 */
 	public function toData():Object{
 		var dto:Object = super.toData();
-		if(_firstActivityUIID == null) { return null; }
-		else { dto.defaultActivityUIID = _firstActivityUIID; }
+		dto.defaultActivityUIID = (_firstActivityUIID == null) ? Config.NUMERIC_NULL_VALUE : _firstActivityUIID;
 
 		return dto;
 	}