Index: Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionDataSynchronizationService.cs
===================================================================
diff -u -r1878cb65b082e46d7e9c74e849d79980b46d3af9 -r446331426de42bdbfe335cab941bd2bb32292340
--- Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionDataSynchronizationService.cs	(.../DuneErosionDataSynchronizationService.cs)	(revision 1878cb65b082e46d7e9c74e849d79980b46d3af9)
+++ Ringtoets/DuneErosion/src/Ringtoets.DuneErosion.Service/DuneErosionDataSynchronizationService.cs	(.../DuneErosionDataSynchronizationService.cs)	(revision 446331426de42bdbfe335cab941bd2bb32292340)
@@ -70,9 +70,9 @@
                 throw new ArgumentNullException(nameof(duneLocations));
             }
 
-            failureMechanism.ClearDuneLocationData();
             if (hydraulicBoundaryLocations.Count == 0 || !duneLocations.Any())
             {
+                failureMechanism.SetDuneLocations(Enumerable.Empty<DuneLocation>());
                 return;
             }
 
@@ -96,6 +96,7 @@
                     correspondingDuneLocations.Add(duneLocation);
                 }
             }
+
             failureMechanism.SetDuneLocations(correspondingDuneLocations);
         }