Index: Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingInputView.cs
===================================================================
diff -u -rd097e3fbbf4a31e1b0818b39eda9d9466eaa6955 -re2b40c9e08052a476113b2cb2492f60057e6e4e1
--- Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingInputView.cs	(.../PipingInputView.cs)	(revision d097e3fbbf4a31e1b0818b39eda9d9466eaa6955)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingInputView.cs	(.../PipingInputView.cs)	(revision e2b40c9e08052a476113b2cb2492f60057e6e4e1)
@@ -244,9 +244,9 @@
         {
             if (oldChartData != null)
             {
-                chartControl.Data.Remove(oldChartData);
+                chartControl.Data.Replace(oldChartData, newChartData);
             }
-            if (newChartData != null)
+            else
             {
                 chartControl.Data.Add(newChartData);
             }