Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs
===================================================================
diff -u -r2ec08867a90646f09852fb338e18b70c6176b5ac -rb060eed93e2290dbe0a36da6e5556002625b73d5
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 2ec08867a90646f09852fb338e18b70c6176b5ac)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision b060eed93e2290dbe0a36da6e5556002625b73d5)
@@ -702,11 +702,11 @@
             return true;
         }
 
-        private DragOperations PipingCalculationGroupContextCanDrop(object draggedData, object targetData, DragOperations validOperations)
+        private DragOperations PipingCalculationGroupContextCanDrop(object draggedData, object targetData)
         {
             if (GetAsIPipingCalculationItem(draggedData) != null && NodesHaveSameParentFailureMechanism(draggedData, targetData))
             {
-                return validOperations;
+                return DragOperations.Move;
             }
 
             return DragOperations.None;