diff --git a/Generated/Classes.cs b/Generated/Classes.cs
index a17b587..854419b 100644
--- a/Generated/Classes.cs
+++ b/Generated/Classes.cs
@@ -1,5 +1,5 @@
 // Auto-generated list of creatable Roblox classes.
-// Updated as of 0.487.1.426995
+// Updated as of 0.489.1.4890338
 
 using System;
 
@@ -903,6 +903,11 @@ namespace RobloxFiles
     {
     }
 
+    public class DataStoreOptions : Instance
+    {
+        public bool AllScopes;
+    }
+
     public class DataStoreService : Instance
     {
         public DataStoreService()
@@ -1148,11 +1153,6 @@ namespace RobloxFiles
         }
     }
 
-    public class GetDataStoreOptions : Instance
-    {
-        public bool AllScopes;
-    }
-
     public class GroupService : Instance
     {
         public GroupService()
@@ -2595,6 +2595,11 @@ namespace RobloxFiles
         public float ZOffset;
     }
 
+    public class PathfindingModifier : Instance
+    {
+        public string ModifierId = "";
+    }
+
     public class PathfindingService : Instance
     {
         public PathfindingService()
diff --git a/RobloxFileFormat.dll b/RobloxFileFormat.dll
index c9dde69..8fdb965 100644
Binary files a/RobloxFileFormat.dll and b/RobloxFileFormat.dll differ
diff --git a/Tree/Instance.cs b/Tree/Instance.cs
index cd3ed77..f805eda 100644
--- a/Tree/Instance.cs
+++ b/Tree/Instance.cs
@@ -124,7 +124,7 @@ namespace RobloxFiles
         {
             if (Attributes.TryGetValue(key, out RbxAttribute attr))
             {
-                if (attr.Value is T result)
+                if (attr?.Value is T result)
                 {
                     value = result;
                     return true;
@@ -152,6 +152,12 @@ namespace RobloxFiles
             if (key.StartsWith("RBX", StringComparison.InvariantCulture))
                 return false;
 
+            if (value == null)
+            {
+                Attributes[key] = null;
+                return true;
+            }
+
             Type type = value.GetType();
 
             if (!RbxAttribute.SupportsType(type))