Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java
===================================================================
diff -u -r0ec0d87a13f5cd499a8300d7a51a6d453108545e -r8dcc1093f9761cad411205fe29cbdeefdb0bf5e5
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java	(.../MonitoringService.java)	(revision 0ec0d87a13f5cd499a8300d7a51a6d453108545e)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/service/MonitoringService.java	(.../MonitoringService.java)	(revision 8dcc1093f9761cad411205fe29cbdeefdb0bf5e5)
@@ -1506,8 +1506,7 @@
 
        private void deletePreviewLesson(Lesson lesson) {
        	if ( lesson != null ) {
-       		if ( lesson.getLearningDesign().getCopyTypeID() != null && 
-       				LearningDesign.COPY_TYPE_PREVIEW == lesson.getLearningDesign().getCopyTypeID().intValue() ) {
+       		if ( lesson.isPreviewLesson() ) {
        			
        	    	// get all the tool sessions for this lesson and remove all the tool session data
        			List toolSessions = lamsCoreToolService.getToolSessionsByLesson(lesson);