Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PresentationObjects/GrassCoverErosionInwardsCalculationGroupContext.cs
===================================================================
diff -u -r8b60c9e846480f3ffeeb263bfea5d3367bf6bee3 -rf0792e734ef5296f2ffaae2ad36619a05d5bd9e3
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PresentationObjects/GrassCoverErosionInwardsCalculationGroupContext.cs	(.../GrassCoverErosionInwardsCalculationGroupContext.cs)	(revision 8b60c9e846480f3ffeeb263bfea5d3367bf6bee3)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Forms/PresentationObjects/GrassCoverErosionInwardsCalculationGroupContext.cs	(.../GrassCoverErosionInwardsCalculationGroupContext.cs)	(revision f0792e734ef5296f2ffaae2ad36619a05d5bd9e3)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using Core.Common.Controls.PresentationObjects;
 using Ringtoets.Common.Data.AssessmentSection;
 using Ringtoets.Common.Data.Calculation;
 using Ringtoets.Common.Forms.PresentationObjects;
@@ -52,5 +53,22 @@
         }
 
         public CalculationGroup Parent { get; }
+
+        public override bool Equals(WrappedObjectContextBase<CalculationGroup> other)
+        {
+            return base.Equals(other)
+                   && other is GrassCoverErosionInwardsCalculationGroupContext
+                   && ReferenceEquals(Parent, ((GrassCoverErosionInwardsCalculationGroupContext) other).Parent);
+        }
+
+        public override bool Equals(object obj)
+        {
+            return Equals(obj as GrassCoverErosionInwardsCalculationGroupContext);
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode() ^ Parent.GetHashCode();
+        }
     }
 }
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