diff --git a/Generated/Classes.cs b/Generated/Classes.cs
index ce731da..e2eb507 100644
--- a/Generated/Classes.cs
+++ b/Generated/Classes.cs
@@ -1,5 +1,5 @@
 // Auto-generated list of creatable Roblox classes.
-// Updated as of 0.447.1.411123
+// Updated as of 0.448.0.411244
 
 using System;
 
@@ -2288,6 +2288,7 @@ namespace RobloxFiles
         public float FallenPartsDestroyHeight = -500;
         public bool FilteringEnabled;
         public float Gravity = 196.2f;
+        public InterpolationThrottlingMode InterpolationThrottling = InterpolationThrottlingMode.Default;
         public bool StreamingEnabled;
         public int StreamingMinRadius = 64;
         public StreamingPauseMode StreamingPauseMode = StreamingPauseMode.Default;
diff --git a/Generated/Enums.cs b/Generated/Enums.cs
index b64a36b..f1f7b0f 100644
--- a/Generated/Enums.cs
+++ b/Generated/Enums.cs
@@ -1,5 +1,5 @@
 // Auto-generated list of Roblox enums.
-// Updated as of 0.447.1.411123
+// Updated as of 0.448.0.411244
 
 namespace RobloxFiles.Enums
 {
@@ -336,6 +336,13 @@ namespace RobloxFiles.Enums
         Sin
     }
 
+    public enum InterpolationThrottlingMode
+    {
+        Default,
+        Disabled,
+        Enabled
+    }
+
     public enum LeftRight
     {
         Left,
diff --git a/RobloxFileFormat.dll b/RobloxFileFormat.dll
index fd76518..a7ba9b6 100644
Binary files a/RobloxFileFormat.dll and b/RobloxFileFormat.dll differ
diff --git a/Tree/Instance.cs b/Tree/Instance.cs
index 2a1a836..5de87fc 100644
--- a/Tree/Instance.cs
+++ b/Tree/Instance.cs
@@ -32,14 +32,17 @@ namespace RobloxFiles
         /// <summary>The raw list of children for this Instance.</summary>
         internal HashSet<Instance> Children = new HashSet<Instance>();
 
-        /// <summary>The raw value of the Instance's parent.</summary>
-        private Instance RawParent;
+        /// <summary>The raw unsafe value of the Instance's parent.</summary>
+        private Instance ParentUnsafe;
 
         /// <summary>The name of this Instance.</summary>
         public string Name;
 
         /// <summary>Indicates whether this Instance should be serialized.</summary>
         public bool Archivable = true;
+
+        /// <summary>The source AssetId this instance was created in.</summary>
+        public long SourceAssetId = -1;
         
         /// <summary>The name of this Instance, if a Name property is defined.</summary>
         public override string ToString() => Name;
@@ -174,25 +177,35 @@ namespace RobloxFiles
         /// </summary>
         public Instance Parent
         {
-            get
-            {
-                return RawParent;
-            }
+            get => ParentUnsafe;
+
             set
             {
                 if (ParentLocked)
-                    throw new Exception("The Parent property of this instance is locked.");
+                {
+                    string newParent = value?.Name ?? "NULL",
+                           currParent = Parent?.Name ?? "NULL";
+
+                    throw new InvalidOperationException($"The Parent property of {Name} is locked, current parent: {currParent}, new parent {newParent}");
+                }
 
                 if (IsAncestorOf(value))
-                    throw new Exception("Parent would result in circular reference.");
+                {
+                    string pathA = GetFullName("."),
+                           pathB = value.GetFullName(".");
+
+                    throw new InvalidOperationException($"Attempt to set parent of {pathA} to {pathB} would result in circular reference");
+                }
 
                 if (Parent == this)
-                    throw new Exception("Attempt to set parent to self.");
+                    throw new InvalidOperationException($"Attempt to set {Name} as its own parent");
 
-                RawParent?.Children.Remove(this);
-                value?.Children.Add(this);
-
-                RawParent = value;
+                lock (ParentUnsafe)
+                {
+                    ParentUnsafe?.Children.Remove(this);
+                    value?.Children.Add(this);
+                    ParentUnsafe = value;
+                }
             }
         }