Index: Riskeer/Integration/src/Riskeer.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs
===================================================================
diff -u -rdb3f612f36ac036fdc7492d55168bb5ee88c5597 -rf3a24f0872b08db2c58e6a7ec64fab7c13588bc9
--- Riskeer/Integration/src/Riskeer.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs	(.../AssessmentSectionMergeHandler.cs)	(revision db3f612f36ac036fdc7492d55168bb5ee88c5597)
+++ Riskeer/Integration/src/Riskeer.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs	(.../AssessmentSectionMergeHandler.cs)	(revision f3a24f0872b08db2c58e6a7ec64fab7c13588bc9)
@@ -546,7 +546,17 @@
 
             if (mergeData.MergeDuneErosion)
             {
+                IObservableEnumerable<DuneLocation> mergedDuneLocations = targetAssessmentSection.DuneErosion.DuneLocations;
+                ObservableList<DuneLocationCalculationsForTargetProbability> mergedDuneLocationCalculations =
+                    targetAssessmentSection.DuneErosion.DuneLocationCalculationsForUserDefinedTargetProbabilities;
+                
+                sourceAssessmentSection.DuneErosion.DuneLocationCalculationsForUserDefinedTargetProbabilities.Clear();
+                sourceAssessmentSection.DuneErosion.RemoveDuneLocations(sourceAssessmentSection.DuneErosion.DuneLocations);
+                
                 targetAssessmentSection.DuneErosion = sourceAssessmentSection.DuneErosion;
+                targetAssessmentSection.DuneErosion.SetDuneLocations(mergedDuneLocations);
+                targetAssessmentSection.DuneErosion.DuneLocationCalculationsForUserDefinedTargetProbabilities.AddRange(mergedDuneLocationCalculations);
+
                 LogMergeMessage(targetAssessmentSection.DuneErosion);
             }
         }