Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -r6fefc4422dcc5076f0ff430f73d829a6670f0285 -r3e256cb82f117480f65220b97be6be7444229824
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 6fefc4422dcc5076f0ff430f73d829a6670f0285)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 3e256cb82f117480f65220b97be6be7444229824)
@@ -659,6 +659,7 @@
             if (calculationGroupContext != null)
             {
                 calculationGroupContext.WrappedData.Children.Remove(context.WrappedData);
+                AssignUnassignCalculations.Delete(context.FailureMechanism, context.WrappedData);
                 calculationGroupContext.NotifyObservers();
             }
         }