Index: Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Plugin/StabilityPointStructuresPlugin.cs
===================================================================
diff -u -r92acb4483676af5adad598c2ea8ca46f9b8379c1 -rb9588439685292e10bcf3a4fcebfc187fd7bd03e
--- Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Plugin/StabilityPointStructuresPlugin.cs	(.../StabilityPointStructuresPlugin.cs)	(revision 92acb4483676af5adad598c2ea8ca46f9b8379c1)
+++ Ringtoets/StabilityPointStructures/src/Ringtoets.StabilityPointStructures.Plugin/StabilityPointStructuresPlugin.cs	(.../StabilityPointStructuresPlugin.cs)	(revision b9588439685292e10bcf3a4fcebfc187fd7bd03e)
@@ -202,7 +202,10 @@
                 Category = RingtoetsCommonFormsResources.Ringtoets_Category,
                 Image = RingtoetsCommonFormsResources.StructuresIcon,
                 FileFilterGenerator = CreateStabilityPointStructureFileFilter(),
-                IsEnabled = context => context.AssessmentSection.ReferenceLine != null
+                IsEnabled = context => context.AssessmentSection.ReferenceLine != null,
+                VerifyUpdates = context => VerifyStructuresShouldUpdate(
+                    context.FailureMechanism,
+                    RingtoetsCommonIOResources.VerifyStructuresShouldUpdate_When_importing_Calculation_with_Structure_data_output_will_be_cleared_confirm)
             };
 
             yield return RingtoetsImportInfoFactory.CreateCalculationConfigurationImportInfo<StabilityPointStructuresCalculationGroupContext>(
@@ -242,7 +245,10 @@
                 Image = RingtoetsCommonFormsResources.StructuresIcon,
                 FileFilterGenerator = CreateStabilityPointStructureFileFilter(),
                 IsEnabled = context => context.WrappedData.SourcePath != null,
-                CurrentPath = context => context.WrappedData.SourcePath
+                CurrentPath = context => context.WrappedData.SourcePath,
+                VerifyUpdates = context => VerifyStructuresShouldUpdate(
+                    context.FailureMechanism,
+                    RingtoetsCommonIOResources.VerifyStructuresShouldUpdate_When_updating_Calculation_with_Structure_data_output_will_be_cleared_confirm)
             };
         }
 
@@ -877,6 +883,15 @@
                                            RingtoetsCommonIOResources.Shape_file_filter_Description);
         }
 
+        private bool VerifyStructuresShouldUpdate(IFailureMechanism failureMechanism, string query)
+        {
+            var changeHandler = new FailureMechanismCalculationChangeHandler(failureMechanism,
+                                                                             query,
+                                                                             new DialogBasedInquiryHelper(Gui.MainWindow));
+
+            return !changeHandler.RequireConfirmation() || changeHandler.InquireConfirmation();
+        }
+
         #endregion
     }
 }
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