Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.IO/StabilityPointStructuresImporter.cs
===================================================================
diff -u -rff948d4633181ead2677ab35467a93b4118c6751 -r96708dc3012a1398efc8829a487369abc24a64c1
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.IO/StabilityPointStructuresImporter.cs	(.../StabilityPointStructuresImporter.cs)	(revision ff948d4633181ead2677ab35467a93b4118c6751)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.IO/StabilityPointStructuresImporter.cs	(.../StabilityPointStructuresImporter.cs)	(revision 96708dc3012a1398efc8829a487369abc24a64c1)
@@ -55,9 +55,16 @@
         {
             IEnumerable<StabilityPointStructure> importedStabilityPointStructures = CreateStabilityPointStructures(structureLocations.ToList(), groupedStructureParameterRows);
 
-            foreach (StabilityPointStructure stabilityPointStructure in importedStabilityPointStructures)
+            foreach (StabilityPointStructure structure in importedStabilityPointStructures)
             {
-                ImportTarget.Add(stabilityPointStructure);
+                if (ImportTarget.Select(s => s.Id).Contains(structure.Id))
+                {
+                    LogStructureExisting(structure.Id);
+                }
+                else
+                {
+                    ImportTarget.Add(structure);
+                }
             }
         }