diff --git a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs
index b736858..1f38633 100644
--- a/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs
+++ b/packages/org.gamecult.eve.unity-scene/Runtime/CultMesh/EveUnityCultMeshLiveProviderTransport.cs
@@ -1471,7 +1471,7 @@ namespace GameCult.Eve.UnityScene
                     var pending = candidate.ObserveCatalog(catalog);
                     if (requiredCatalogVersion > 0 && catalog.Version == requiredCatalogVersion)
                         requiredCatalog.TrySetResult(catalog);
-                    if (pending != null)
+                    if (pending != null && requiredCatalogVersion <= 0)
                         QueueAssetCatalogUpdate(candidate.SourceIdentity, pending);
                 });
                 candidate.CatalogWatch = watch;
@@ -1508,7 +1508,7 @@ namespace GameCult.Eve.UnityScene
             previous.TransferSharedBundlesTo(candidate);
             _assetGeneration = candidate;
             var pendingCatalog = candidate.ActivateCatalogObservation();
-            if (pendingCatalog != null)
+            if (pendingCatalog != null && candidate.Source.RequiredCatalogVersion <= 0)
                 QueueAssetCatalogUpdate(candidate.SourceIdentity, pendingCatalog);
             if (surface != null)
                 _baseSurface = surface;
@@ -1624,9 +1624,15 @@ namespace GameCult.Eve.UnityScene
 
         private void QueueAssetCatalogUpdate(string sourceIdentity, EveAssetCatalogDocument catalog)
         {
+            if (catalog == null) throw new ArgumentNullException(nameof(catalog));
+            if (_assetGeneration.Source.RequiredCatalogVersion > 0)
+            {
+                _pendingAssetCatalog = null;
+                return;
+            }
             _pendingAssetCatalog = new PendingAssetCatalogUpdate(
                 sourceIdentity,
-                catalog ?? throw new ArgumentNullException(nameof(catalog)));
+                catalog);
             if (_assetCatalogUpdateRunning) return;
             _assetCatalogUpdateRunning = true;
             _ = DrainAssetCatalogUpdatesAsync();
@@ -1641,6 +1647,8 @@ namespace GameCult.Eve.UnityScene
                     var update = _pendingAssetCatalog;
                     _pendingAssetCatalog = null;
                     if (update == null) break;
+                    if (_assetGeneration.Source.RequiredCatalogVersion > 0)
+                        continue;
                     if (!string.Equals(update.SourceIdentity, CurrentAssetSourceIdentity, StringComparison.Ordinal))
                         continue;
                     if (update.Catalog.Version == CurrentAssetCatalogVersion)
@@ -1649,7 +1657,8 @@ namespace GameCult.Eve.UnityScene
                     try
                     {
                         if (!string.Equals(update.SourceIdentity, CurrentAssetSourceIdentity, StringComparison.Ordinal) ||
-                            update.Catalog.Version == CurrentAssetCatalogVersion)
+                            update.Catalog.Version == CurrentAssetCatalogVersion ||
+                            _assetGeneration.Source.RequiredCatalogVersion > 0)
                             continue;
                         var currentSource = _assetGeneration.Source;
                         var source = new AssetSource(
@@ -1657,9 +1666,10 @@ namespace GameCult.Eve.UnityScene
                             currentSource.ProviderId,
                             currentSource.ManifestRecordRef,
                             currentSource.RendezvousEndpoints,
-                            update.Catalog.Version);
+                            0);
                         var candidate = await BuildAssetGenerationAsync(source, _lifetime.Token);
-                        if (!string.Equals(update.SourceIdentity, CurrentAssetSourceIdentity, StringComparison.Ordinal))
+                        if (!string.Equals(update.SourceIdentity, CurrentAssetSourceIdentity, StringComparison.Ordinal) ||
+                            _assetGeneration.Source.RequiredCatalogVersion > 0)
                         {
                             candidate.Dispose();
                             continue;
diff --git a/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs b/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs
index c1cc857..0d0d892 100644
--- a/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs
+++ b/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveUnityCultMeshAssetLookupTests.cs
@@ -656,6 +656,46 @@ namespace GameCult.Eve.UnityScene.Tests
             ((IDisposable)candidate).Dispose();
         }
 
+        [Test]
+        public void PinnedSurfaceCatalogDoesNotAutoAdvanceWithoutANewerBaseSurface()
+        {
+            var transportType = typeof(EveUnityCultMeshLiveProviderTransport);
+            var generationField = transportType.GetField(
+                "_assetGeneration",
+                BindingFlags.Instance | BindingFlags.NonPublic)!;
+            var pendingField = transportType.GetField(
+                "_pendingAssetCatalog",
+                BindingFlags.Instance | BindingFlags.NonPublic)!;
+            var queue = transportType.GetMethod(
+                "QueueAssetCatalogUpdate",
+                BindingFlags.Instance | BindingFlags.NonPublic)!;
+            using var transport = new EveUnityCultMeshLiveProviderTransport(
+                Path.Combine(Path.GetTempPath(), $"eve-pinned-catalog-{Guid.NewGuid():N}.cc"),
+                "cultnet+tcp://127.0.0.1:1",
+                "verse-a",
+                "authority-a",
+                "provider-a",
+                "surface-a");
+            var initial = (IDisposable)generationField.GetValue(transport)!;
+            var committed = CreateAssetGeneration(
+                "verse-a", "authority-a", "provider-a", "catalog-a", "source-a", 41, 41);
+            initial.Dispose();
+            generationField.SetValue(transport, committed);
+            var catalog42 = new EveAssetCatalogDocument(
+                "provider-a",
+                "catalog-a",
+                42,
+                DateTimeOffset.UtcNow.ToString("O"),
+                Array.Empty<EveAssetCatalogEntry>());
+
+            queue.Invoke(transport, new object[] { "source-a", catalog42 });
+
+            Assert.That(GenerationProperty<long>(generationField.GetValue(transport)!, "CatalogVersion"), Is.EqualTo(41));
+            var committedSource = GenerationProperty<object>(generationField.GetValue(transport)!, "Source");
+            Assert.That(GenerationProperty<long>(committedSource, "RequiredCatalogVersion"), Is.EqualTo(41));
+            Assert.That(pendingField.GetValue(transport), Is.Null);
+        }
+
         [Test]
         public void CrossTargetAssetsUseConfiguredRemoteTrust()
         {
@@ -685,7 +725,8 @@ namespace GameCult.Eve.UnityScene.Tests
             string verseId,
             string authorityRuntimeId,
             string providerId,
-            string manifestRecordRef)
+            string manifestRecordRef,
+            long requiredCatalogVersion = 0)
         {
             var type = typeof(EveUnityCultMeshLiveProviderTransport).GetNestedType(
                 "AssetSource",
@@ -699,7 +740,8 @@ namespace GameCult.Eve.UnityScene.Tests
                     new CultMeshSessionTarget(verseId, authorityRuntimeId),
                     providerId,
                     manifestRecordRef,
-                    Array.Empty<string>()
+                    Array.Empty<string>(),
+                    requiredCatalogVersion
                 },
                 null)!;
         }
@@ -710,7 +752,8 @@ namespace GameCult.Eve.UnityScene.Tests
             string providerId,
             string manifestRecordRef,
             string sourceIdentity,
-            long catalogVersion)
+            long catalogVersion,
+            long requiredCatalogVersion = 0)
         {
             var type = typeof(EveUnityCultMeshLiveProviderTransport).GetNestedType(
                 "AssetGeneration",
@@ -721,7 +764,7 @@ namespace GameCult.Eve.UnityScene.Tests
                 null,
                 new[]
                 {
-                    CreateAssetSource(verseId, authorityRuntimeId, providerId, manifestRecordRef),
+                    CreateAssetSource(verseId, authorityRuntimeId, providerId, manifestRecordRef, requiredCatalogVersion),
                     sourceIdentity,
                     catalogVersion,
                     null
diff --git a/packages/org.gamecult.eve.unity-scene/package.json b/packages/org.gamecult.eve.unity-scene/package.json
index 527a329..d4aed2e 100644
--- a/packages/org.gamecult.eve.unity-scene/package.json
+++ b/packages/org.gamecult.eve.unity-scene/package.json
@@ -1,7 +1,7 @@
 {
     "name": "org.gamecult.eve.unity-scene",
     "displayName": "Eve Unity Scene Lowering",
-    "version": "0.3.131",
+    "version": "0.3.132",
     "unity": "6000.0",
     "description": "Provider-agnostic Unity scene shell for gamecult.eve.surface.v1 interactive world surfaces.",
     "dependencies": {