Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.IO/Configurations/ClosingStructuresCalculationStochastAssigner.cs
===================================================================
diff -u -r21793a296d0cd97d04a07d8287878a7b9ae16145 -r962b12b30e8f86327095e2929dd92fe2aeddbc48
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.IO/Configurations/ClosingStructuresCalculationStochastAssigner.cs	(.../ClosingStructuresCalculationStochastAssigner.cs)	(revision 21793a296d0cd97d04a07d8287878a7b9ae16145)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.IO/Configurations/ClosingStructuresCalculationStochastAssigner.cs	(.../ClosingStructuresCalculationStochastAssigner.cs)	(revision 962b12b30e8f86327095e2929dd92fe2aeddbc48)
@@ -131,6 +131,15 @@
 
         protected override bool ValidateSpecificStochasts()
         {
+            if (Configuration.ModelFactorSuperCriticalFlow?.StandardDeviation != null
+                || Configuration.ModelFactorSuperCriticalFlow?.VariationCoefficient != null)
+            {
+                Log.LogCalculationConversionError(
+                    RingtoetsCommonIOResources.CalculationConfigurationImporter_ValidateStochasts_Cannot_define_spread_for_ModelFactorSuperCriticalFlow,
+                    Configuration.Name);
+                return false;
+            }
+
             if (Configuration.DrainCoefficient?.StandardDeviation != null
                 || Configuration.DrainCoefficient?.VariationCoefficient != null)
             {
@@ -139,6 +148,7 @@
                     Configuration.Name);
                 return false;
             }
+
             return true;
         }
     }