Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs
===================================================================
diff -u -r83024e3b1086e1dba93b83df874bd4781f67aa63 -r3136184db9ebd1b0c422749ebfc5e8a1c8cb99c3
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 83024e3b1086e1dba93b83df874bd4781f67aa63)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 3136184db9ebd1b0c422749ebfc5e8a1c8cb99c3)
@@ -455,6 +455,14 @@
             var parentGroupContext = (ClosingStructuresCalculationGroupContext) parentNodeData;
 
             parentGroupContext.WrappedData.Children.Remove(context.WrappedData);
+            foreach (var calculation in context.WrappedData.GetCalculations().Cast<ClosingStructuresCalculation>())
+            {
+                ClosingStructuresHelper.Delete(context.FailureMechanism.SectionResults,
+                                               calculation,
+                                               context.FailureMechanism.Calculations.Cast<ClosingStructuresCalculation>());
+            }
+
+            parentGroupContext.WrappedData.Children.Remove(context.WrappedData);
             parentGroupContext.NotifyObservers();
         }