Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Forms/PropertyClasses/HeightStructuresInputContextProperties.cs
===================================================================
diff -u -r449b5831547d5a6391da8ad825e7c845ef7ecc1c -r5fae8cb70dd4efeb648c5ff5ee02c837a47172db
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Forms/PropertyClasses/HeightStructuresInputContextProperties.cs	(.../HeightStructuresInputContextProperties.cs)	(revision 449b5831547d5a6391da8ad825e7c845ef7ecc1c)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Forms/PropertyClasses/HeightStructuresInputContextProperties.cs	(.../HeightStructuresInputContextProperties.cs)	(revision 5fae8cb70dd4efeb648c5ff5ee02c837a47172db)
@@ -109,6 +109,15 @@
 
         #endregion
 
+        public override bool IsReadOnly(string property)
+        {
+            if (property == nameof(FailureProbabilityStructureWithErosion))
+            {
+                return !HasStructure();
+            }
+            return base.IsReadOnly(property);
+        }
+
         public override IEnumerable<ForeshoreProfile> GetAvailableForeshoreProfiles()
         {
             return data.FailureMechanism.ForeshoreProfiles;