Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs
===================================================================
diff -u -r5e9fd91bb55d97ee46d4446960dfa7f63b0d48cf -reff17c44b14a8e6f3e6fb7ee123f967b552df6a2
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision 5e9fd91bb55d97ee46d4446960dfa7f63b0d48cf)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Plugin/GrassCoverErosionInwardsGuiPlugin.cs	(.../GrassCoverErosionInwardsGuiPlugin.cs)	(revision eff17c44b14a8e6f3e6fb7ee123f967b552df6a2)
@@ -70,7 +70,10 @@
                 FailureMechanismContextMenuStrip,
                 Gui);
 
-            yield return CalculationTreeNodeInfoFactory.CreateCalculationGroupContextTreeNodeInfo<GrassCoverErosionInwardsCalculationGroupContext>(CalculationGroupContextChildNodeObjects, CalculationGroupContextContextMenuStrip);
+            yield return CalculationTreeNodeInfoFactory.CreateCalculationGroupContextTreeNodeInfo<GrassCoverErosionInwardsCalculationGroupContext>(
+                CalculationGroupContextChildNodeObjects,
+                CalculationGroupContextContextMenuStrip,
+                CalculationGroupContextOnNodeRemoved);
 
             yield return new TreeNodeInfo<GrassCoverErosionInwardsCalculationContext>
             {
@@ -372,6 +375,14 @@
                 .Build();
         }
 
+        private void CalculationGroupContextOnNodeRemoved(GrassCoverErosionInwardsCalculationGroupContext nodeData, object parentNodeData)
+        {
+            var parentGroupContext = (GrassCoverErosionInwardsCalculationGroupContext) parentNodeData;
+
+            parentGroupContext.WrappedData.Children.Remove(nodeData.WrappedData);
+            parentGroupContext.NotifyObservers();
+        }
+
         #endregion
     }
 }
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