Index: Ringtoets/Migration/src/Ringtoets.Migration.Core/EmbeddedResources/Migration_17.3_18.1.sql
===================================================================
diff -u -r0bf23391f0e54ec81094b93b84ae9b3ac511ecff -rce6ccec78e3c63aafd8f24b5ad64a7d3660f9312
--- Ringtoets/Migration/src/Ringtoets.Migration.Core/EmbeddedResources/Migration_17.3_18.1.sql	(.../Migration_17.3_18.1.sql)	(revision 0bf23391f0e54ec81094b93b84ae9b3ac511ecff)
+++ Ringtoets/Migration/src/Ringtoets.Migration.Core/EmbeddedResources/Migration_17.3_18.1.sql	(.../Migration_17.3_18.1.sql)	(revision ce6ccec78e3c63aafd8f24b5ad64a7d3660f9312)
@@ -2543,6 +2543,18 @@
 	JOIN TempAssessmentSectionFailureMechanism AS asfm ON asfm.[FailureMechanismId] = fms.[FailureMechanismEntityId]
 	WHERE source.[LayerThree] IS NOT NULL;
 
+INSERT INTO TempChanges
+SELECT 
+	asfm.[AssessmentSectionId],
+	asfm.[AssessmentSectionName],
+	asfm.[FailureMechanismId],
+	asfm.[FailureMechanismName],
+	"De waarde van '" || source.[ProbabilityOrFrequencyOpenStructureBeforeFlooding] || "' van parameter 'Kans op open staan bij naderend hoogwater' van kunstwerk '" || source.[Name] || "' is ongeldig en is veranderd naar NaN."
+	FROM ClosingStructureEntity AS cs
+	JOIN [SOURCEPROJECT].ClosingStructureEntity AS source ON cs.[rowid] = source.[rowid]
+	JOIN TempAssessmentSectionFailureMechanism AS asfm ON asfm.[FailureMechanismId] = cs.[FailureMechanismEntityId]
+	WHERE source.[ProbabilityOrFrequencyOpenStructureBeforeFlooding] IS NOT cs.[ProbabilityOpenStructureBeforeFlooding];
+
 INSERT INTO [LOGDATABASE].MigrationLogEntity (
 	[FromVersion], 
 	[ToVersion], 
Index: Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs
===================================================================
diff -u -r0bf23391f0e54ec81094b93b84ae9b3ac511ecff -rce6ccec78e3c63aafd8f24b5ad64a7d3660f9312
--- Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs	(.../MigrationTo181IntegrationTest.cs)	(revision 0bf23391f0e54ec81094b93b84ae9b3ac511ecff)
+++ Ringtoets/Migration/test/Ringtoets.Migration.Integration.Test/MigrationTo181IntegrationTest.cs	(.../MigrationTo181IntegrationTest.cs)	(revision ce6ccec78e3c63aafd8f24b5ad64a7d3660f9312)
@@ -309,7 +309,7 @@
             {
                 ReadOnlyCollection<MigrationLogMessage> messages = reader.GetMigrationLogMessages();
 
-                Assert.AreEqual(61, messages.Count);
+                Assert.AreEqual(64, messages.Count);
                 var i = 0;
                 MigrationLogTestHelper.AssertMigrationLogMessageEqual(
                     new MigrationLogMessage("17.3", newVersion, "Gevolgen van de migratie van versie 17.3 naar versie 18.1:"),
@@ -529,6 +529,16 @@
                     messages[i++]);
                 MigrationLogTestHelper.AssertMigrationLogMessageEqual(
                     new MigrationLogMessage("17.3", newVersion, "    - De waarde '15.0' voor de verschuiving van parameter 'Verzadigd gewicht' van ondergrondlaag 'BelowPhreaticLevelShift' is ongeldig en is veranderd naar NaN."),
+                    messages[i++]);
+
+                MigrationLogTestHelper.AssertMigrationLogMessageEqual(
+                    new MigrationLogMessage("17.3", newVersion, "* Traject: 'Kunstwerken sluiten invalide'"),
+                    messages[i++]);
+                MigrationLogTestHelper.AssertMigrationLogMessageEqual(
+                    new MigrationLogMessage("17.3", newVersion, "  + Toetsspoor: 'Betrouwbaarheid sluiting kunstwerk'"),
+                    messages[i++]);
+                MigrationLogTestHelper.AssertMigrationLogMessageEqual(
+                    new MigrationLogMessage("17.3", newVersion, "    - De waarde van '1.1' van parameter 'Kans op open staan bij naderend hoogwater' van kunstwerk 'Gemaal Leemans' is ongeldig en is veranderd naar NaN."),
                     messages[i]);
             }
         }