Index: lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/service/AssessmentServiceImpl.java
===================================================================
diff -u -rd4198d73576015c08d18ebf55f3079c84fdf3415 -rdac907ce79fde14b5b168324b3a2da18404d6dcb
--- lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/service/AssessmentServiceImpl.java	(.../AssessmentServiceImpl.java)	(revision d4198d73576015c08d18ebf55f3079c84fdf3415)
+++ lams_tool_assessment/src/java/org/lamsfoundation/lams/tool/assessment/service/AssessmentServiceImpl.java	(.../AssessmentServiceImpl.java)	(revision dac907ce79fde14b5b168324b3a2da18404d6dcb)
@@ -3638,8 +3638,10 @@
 		}
 
 		if (isModification) {
-		    addToCollection &= !collectionUUIDs.contains(uuid);
-
+		    if (collectionUUIDs != null) {
+			addToCollection &= !collectionUUIDs.contains(uuid);
+		    }
+		    
 		    int isModified = qbQuestion.isQbQuestionModified(oldQbQuestion);
 		    if (isModified == IQbService.QUESTION_MODIFIED_VERSION_BUMP) {
 			qbQuestion.clearID();