Index: Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs
===================================================================
diff -u -r1bd68d22bc0484d9d18afb2a776b8f5943712803 -r98bb82fc9a5d16eab7a9d25b69f20806ef10a1f1
--- Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs	(.../RingtoetsDataSynchronizationService.cs)	(revision 1bd68d22bc0484d9d18afb2a776b8f5943712803)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs	(.../RingtoetsDataSynchronizationService.cs)	(revision 98bb82fc9a5d16eab7a9d25b69f20806ef10a1f1)
@@ -295,27 +295,19 @@
             }
 
             var changedObservables = new List<IObservable>();
+
             foreach (IFailureMechanism failureMechanism in failureMechanisms)
             {
                 var grassCoverErosionOutwardsFailureMechanism = failureMechanism as GrassCoverErosionOutwardsFailureMechanism;
-                var duneErosionFailureMechanism = failureMechanism as DuneErosionFailureMechanism;
-
                 if (grassCoverErosionOutwardsFailureMechanism != null)
                 {
-                    IEnumerable<IObservable> affectedHydraulicBoundaryLocations =
-                        GrassCoverErosionOutwardsDataSynchronizationService.ClearHydraulicBoundaryLocationCalculationOutputs(grassCoverErosionOutwardsFailureMechanism);
-                    changedObservables.AddRange(affectedHydraulicBoundaryLocations);
+                    changedObservables.AddRange(GrassCoverErosionOutwardsDataSynchronizationService.ClearHydraulicBoundaryLocationCalculationOutputs(grassCoverErosionOutwardsFailureMechanism));
                 }
 
+                var duneErosionFailureMechanism = failureMechanism as DuneErosionFailureMechanism;
                 if (duneErosionFailureMechanism != null)
                 {
-                    IEnumerable<IObservable> affectedDuneLocations =
-                        DuneErosionDataSynchronizationService.ClearDuneLocationOutput(duneErosionFailureMechanism.DuneLocations);
-
-                    if (affectedDuneLocations.Any())
-                    {
-                        changedObservables.AddRange(affectedDuneLocations);
-                    }
+                    changedObservables.AddRange(DuneErosionDataSynchronizationService.ClearDuneLocationOutput(duneErosionFailureMechanism.DuneLocations));
                 }
             }