diff --git a/Packages/net.fushizen.modular-avatar/Editor/MergeAnimatorHook.cs b/Packages/net.fushizen.modular-avatar/Editor/MergeAnimatorHook.cs
index 384f0393..2e7cd8ac 100644
--- a/Packages/net.fushizen.modular-avatar/Editor/MergeAnimatorHook.cs
+++ b/Packages/net.fushizen.modular-avatar/Editor/MergeAnimatorHook.cs
@@ -46,6 +46,9 @@ namespace net.fushizen.modular_avatar.core.editor
         
         protected override bool OnPreprocessAvatarWrapped(GameObject avatarGameObject)
         {
+            defaultControllers_.Clear();
+            mergeSessions.Clear();
+            
             var descriptor = avatarGameObject.GetComponent<VRCAvatarDescriptor>();
 
             InitSessions(descriptor.baseAnimationLayers);
diff --git a/Packages/net.fushizen.modular-avatar/Editor/MergeArmatureHook.cs b/Packages/net.fushizen.modular-avatar/Editor/MergeArmatureHook.cs
index 7c9fb157..a48b5e1b 100644
--- a/Packages/net.fushizen.modular-avatar/Editor/MergeArmatureHook.cs
+++ b/Packages/net.fushizen.modular-avatar/Editor/MergeArmatureHook.cs
@@ -43,6 +43,9 @@ namespace net.fushizen.modular_avatar.core.editor
 
         protected override bool OnPreprocessAvatarWrapped(GameObject avatarGameObject)
         {
+            BoneRemappings.Clear();
+            ToDelete.Clear();
+            
             var mergeArmatures = avatarGameObject.transform.GetComponentsInChildren<ModularAvatarMergeArmature>(true);
             
             BoneRemappings.Clear();