Index: Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs
===================================================================
diff -u -re699be5b9029b6d27100eb8934e80f7a817c3d9e -rb0fb3401fabb0a77df32607b1d2d20e4aa6cb3fa
--- Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs	(.../RingtoetsDataSynchronizationService.cs)	(revision e699be5b9029b6d27100eb8934e80f7a817c3d9e)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Service/RingtoetsDataSynchronizationService.cs	(.../RingtoetsDataSynchronizationService.cs)	(revision b0fb3401fabb0a77df32607b1d2d20e4aa6cb3fa)
@@ -312,7 +312,11 @@
                     IEnumerable<IObservable> affectedDuneLocations =
                         DuneErosionDataSynchronizationService.ClearDuneLocationOutput(duneErosionFailureMechanism.DuneLocations)
                                                              .Concat(DuneErosionDataSynchronizationService.ClearDuneCalculationOutputs(duneErosionFailureMechanism));
-                    changedObservables.AddRange(affectedDuneLocations);
+
+                    if (affectedDuneLocations.Any())
+                    {
+                        changedObservables.AddRange(affectedDuneLocations);
+                    }
                 }
             }