Index: DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs
===================================================================
diff -u -r4540 -r5223
--- DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 4540)
+++ DamEngine/trunk/src/Deltares.DamEngine.Data/General/Dike.cs	(.../Dike.cs)	(revision 5223)
@@ -187,12 +187,13 @@
     /// </summary>
     public void ClearLocationScenariosExceptFirst()
     {
-        foreach (Location location in Locations)
+        Locations = Locations.Select(location =>
         {
             DesignScenario scenario = location.Scenarios[0].CloneInput();
             location.Scenarios.Clear();
             location.Scenarios.Add(scenario);
-        }
+            return location;
+        }).ToList();
     }
 
     /// <summary>