Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresDataSynchronizationService.cs
===================================================================
diff -u -rce9e1d476f00cfb42ce2a8ab6c762baf5abfd97b -r2a0fbe6ec22928831305671ecd4f41030b827250
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresDataSynchronizationService.cs	(.../HeightStructuresDataSynchronizationService.cs)	(revision ce9e1d476f00cfb42ce2a8ab6c762baf5abfd97b)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Service/HeightStructuresDataSynchronizationService.cs	(.../HeightStructuresDataSynchronizationService.cs)	(revision 2a0fbe6ec22928831305671ecd4f41030b827250)
@@ -140,16 +140,16 @@
             foreach (StructuresCalculation<HeightStructuresInput> calculation in calculationWithRemovedHeightStructure)
             {
                 calculation.InputParameters.Structure = null;
-
-                IEnumerable<StructuresFailureMechanismSectionResult<HeightStructuresInput>> affectedSectionResults =
-                    StructuresHelper.Delete(failureMechanism.SectionResults, calculation, heightStructureCalculations);
-                foreach (StructuresFailureMechanismSectionResult<HeightStructuresInput> result in affectedSectionResults)
-                {
-                    changedObservables.Add(result);
-                }
                 changedObservables.Add(calculation.InputParameters);
             }
 
+            IEnumerable<StructuresFailureMechanismSectionResult<HeightStructuresInput>> affectedSectionResults =
+                StructuresHelper.UpdateCalculationToSectionResultAssignments(failureMechanism.SectionResults, heightStructureCalculations);
+            foreach (StructuresFailureMechanismSectionResult<HeightStructuresInput> result in affectedSectionResults)
+            {
+                changedObservables.Add(result);
+            }
+
             failureMechanism.HeightStructures.Remove(structure);
             changedObservables.Add(failureMechanism.HeightStructures);