Index: Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanism.cs
===================================================================
diff -u -r46bd119497bde576fd18d0b4f93961f2a7f84c34 -r42c710f0341da1ca4fc911ef8ba502a41073e400
--- Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanism.cs	(.../PipingFailureMechanism.cs)	(revision 46bd119497bde576fd18d0b4f93961f2a7f84c34)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Data/PipingFailureMechanism.cs	(.../PipingFailureMechanism.cs)	(revision 42c710f0341da1ca4fc911ef8ba502a41073e400)
@@ -97,14 +97,12 @@
         {
             base.AddSection(section);
             sectionResults.Add(new PipingFailureMechanismSectionResult(section));
-            sectionResults.NotifyObservers();
         }
 
         public override void ClearAllSections()
         {
             base.ClearAllSections();
             sectionResults.Clear();
-            sectionResults.NotifyObservers();
         }
     }
 }
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