Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs
===================================================================
diff -u -r46f086e68a57ff5a578d684cbfeecbf22abd9551 -r7947681ebba776d55c4f78782360256800fa5d1f
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs	(.../HeightStructuresPlugin.cs)	(revision 46f086e68a57ff5a578d684cbfeecbf22abd9551)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Plugin/HeightStructuresPlugin.cs	(.../HeightStructuresPlugin.cs)	(revision 7947681ebba776d55c4f78782360256800fa5d1f)
@@ -527,8 +527,13 @@
                    .AddExportItem()
                    .AddSeparator();
 
-            if (!isNestedGroup)
+            if (isNestedGroup)
             {
+                builder.AddDuplicateCalculationItem(group, context)
+                       .AddSeparator();
+            }
+            else
+            {
                 builder.AddCustomItem(CreateGenerateHeightStructuresCalculationsItem(context))
                        .AddSeparator();
             }