Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs
===================================================================
diff -u -r66f5a4ce15c1de857ae5a5dc8c90e8cf4f3eafae -r0a684e8c46a9d375b887d84e777e5e80829308a7
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs	(.../AssessmentSectionMergeHandler.cs)	(revision 66f5a4ce15c1de857ae5a5dc8c90e8cf4f3eafae)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs	(.../AssessmentSectionMergeHandler.cs)	(revision 0a684e8c46a9d375b887d84e777e5e80829308a7)
@@ -242,6 +242,8 @@
                     targetAssessmentSection, failureMechanism,
                     (section, mechanism) => section.GrassCoverErosionOutwards = mechanism))
                 {
+                    UpdateHydraulicBoundaryLocationReferences<GrassCoverErosionOutwardsFailureMechanism, GrassCoverErosionOutwardsWaveConditionsCalculation, FailureMechanismCategoryWaveConditionsInput>(
+                        targetAssessmentSection.GrassCoverErosionOutwards, hydraulicBoundaryLocations);
                     continue;
                 }