diff --git a/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamErrors.GeneratedConstructors.cs b/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamErrors.GeneratedConstructors.cs
index c20c0cb..718f4cc 100644
--- a/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamErrors.GeneratedConstructors.cs
+++ b/dotnet/src/ZB.MOM.NatsNet.Server/JetStream/JetStreamErrors.GeneratedConstructors.cs
@@ -1200,6 +1200,30 @@ public static partial class JsApiErrors
         return Clone(StreamTooManyRequests);
     }
 
+    public static JsApiError NewJSStreamWrongLastSequenceConstantError(params ErrorOption[] opts)
+    {
+        if (ParseOpts(opts) is JsApiError overridden)
+            return Clone(overridden);
+
+        return Clone(StreamWrongLastSequenceConstant);
+    }
+
+    public static JsApiError NewJSTempStorageFailedError(params ErrorOption[] opts)
+    {
+        if (ParseOpts(opts) is JsApiError overridden)
+            return Clone(overridden);
+
+        return Clone(TempStorageFailed);
+    }
+
+    public static JsApiError NewJSTemplateNameNotMatchSubjectError(params ErrorOption[] opts)
+    {
+        if (ParseOpts(opts) is JsApiError overridden)
+            return Clone(overridden);
+
+        return Clone(TemplateNameNotMatchSubject);
+    }
+
     public static JsApiError NewJSAtomicPublishTooLargeBatchError(object? size, params ErrorOption[] opts)
     {
         if (ParseOpts(opts) is JsApiError overridden)
@@ -1544,6 +1568,30 @@ public static partial class JsApiErrors
         return NewWithTags(StreamTransformInvalidSource, "{err}", err);
     }
 
+    public static JsApiError NewJSStreamUpdateError(Exception err, params ErrorOption[] opts)
+    {
+        if (ParseOpts(opts) is JsApiError overridden)
+            return Clone(overridden);
+
+        return NewWithTags(StreamUpdate, "{err}", err);
+    }
+
+    public static JsApiError NewJSStreamWrongLastMsgIDError(object? id, params ErrorOption[] opts)
+    {
+        if (ParseOpts(opts) is JsApiError overridden)
+            return Clone(overridden);
+
+        return NewWithTags(StreamWrongLastMsgID, "{id}", id);
+    }
+
+    public static JsApiError NewJSStreamWrongLastSequenceError(ulong seq, params ErrorOption[] opts)
+    {
+        if (ParseOpts(opts) is JsApiError overridden)
+            return Clone(overridden);
+
+        return NewWithTags(StreamWrongLastSequence, "{seq}", seq);
+    }
+
     public static JsApiError NewJSStreamExternalApiOverlapError(object? prefix, object? subject, params ErrorOption[] opts)
     {
         if (ParseOpts(opts) is JsApiError overridden)
diff --git a/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/JetStream/JetStreamErrorsGeneratedConstructorsTests.cs b/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/JetStream/JetStreamErrorsGeneratedConstructorsTests.cs
index 1065454..35d450a 100644
--- a/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/JetStream/JetStreamErrorsGeneratedConstructorsTests.cs
+++ b/dotnet/tests/ZB.MOM.NatsNet.Server.Tests/JetStream/JetStreamErrorsGeneratedConstructorsTests.cs
@@ -333,4 +333,23 @@ public sealed class JetStreamErrorsGeneratedConstructorsTests
         fromOverride.Description.ShouldBe(expected.Description);
         ReferenceEquals(fromOverride, expected).ShouldBeFalse();
     }
+
+    [Fact]
+    public void ConstructorSurface_Group11()
+    {
+        JsApiErrors.NewJSStreamWrongLastSequenceConstantError().ErrCode.ShouldBe(JsApiErrors.StreamWrongLastSequenceConstant.ErrCode);
+        JsApiErrors.NewJSTempStorageFailedError().ErrCode.ShouldBe(JsApiErrors.TempStorageFailed.ErrCode);
+        JsApiErrors.NewJSTemplateNameNotMatchSubjectError().ErrCode.ShouldBe(JsApiErrors.TemplateNameNotMatchSubject.ErrCode);
+
+        JsApiErrors.NewJSStreamUpdateError(new InvalidOperationException("update failed")).Description.ShouldBe("update failed");
+        JsApiErrors.NewJSStreamWrongLastMsgIDError("msg-42").Description.ShouldBe("wrong last msg ID: msg-42");
+        JsApiErrors.NewJSStreamWrongLastSequenceError(42UL).Description.ShouldBe("wrong last sequence: 42");
+
+        var expected = new JsApiError { Code = 489, ErrCode = 9100, Description = "override-11" };
+        var fromOverride = JsApiErrors.NewJSTempStorageFailedError(JsApiErrors.Unless(expected));
+        fromOverride.Code.ShouldBe(expected.Code);
+        fromOverride.ErrCode.ShouldBe(expected.ErrCode);
+        fromOverride.Description.ShouldBe(expected.Description);
+        ReferenceEquals(fromOverride, expected).ShouldBeFalse();
+    }
 }
diff --git a/porting.db b/porting.db
index f27c5a4..0feca9c 100644
Binary files a/porting.db and b/porting.db differ
diff --git a/tools/generate-jetstream-errors.sh b/tools/generate-jetstream-errors.sh
index edff050..d8481cf 100755
--- a/tools/generate-jetstream-errors.sh
+++ b/tools/generate-jetstream-errors.sh
@@ -154,6 +154,9 @@ simple_methods=(
   "NewJSStreamSubjectOverlapError|StreamSubjectOverlap"
   "NewJSStreamTemplateNotFoundError|StreamTemplateNotFound"
   "NewJSStreamTooManyRequestsError|StreamTooManyRequests"
+  "NewJSStreamWrongLastSequenceConstantError|StreamWrongLastSequenceConstant"
+  "NewJSTempStorageFailedError|TempStorageFailed"
+  "NewJSTemplateNameNotMatchSubjectError|TemplateNameNotMatchSubject"
 )
 
 templated_methods=(
@@ -200,6 +203,9 @@ templated_methods=(
   "NewJSStreamTemplateDeleteError|Exception|err|StreamTemplateDelete|{err}"
   "NewJSStreamTransformInvalidDestinationError|Exception|err|StreamTransformInvalidDestination|{err}"
   "NewJSStreamTransformInvalidSourceError|Exception|err|StreamTransformInvalidSource|{err}"
+  "NewJSStreamUpdateError|Exception|err|StreamUpdate|{err}"
+  "NewJSStreamWrongLastMsgIDError|object?|id|StreamWrongLastMsgID|{id}"
+  "NewJSStreamWrongLastSequenceError|ulong|seq|StreamWrongLastSequence|{seq}"
 )
 
 templated_methods_two_args=(