### Godot version

0810ecaafdbee3ea747219e6ab3a8de5d2216a09

### System information

Windows 11, Nvidia 3000, firefox

### Issue description

Exporting the gltf file is corrupt in blender.

### Steps to reproduce

1. Open project.
2. Export as glb
3. Open in blender
4. Blender display many warnings

![image](https://user-images.githubusercontent.com/32321/216740742-de662c5c-f5c3-44b5-a36e-8ad33defdbba.png)


### Minimal reproduction project

https://cdn.discordapp.com/attachments/598003845657788438/1071249610896580691/Test_Game_Project.zip


DisjointSet<GLTFNodeIndex> subtree_set;
	
	
	
	
	
	
	for (int i = 0; i < p_non_joints.size(); ++i) {
		const GLTFNodeIndex node_i = p_non_joints[i];
		subtree_set.insert(node_i);
		const GLTFNodeIndex parent_i = p_state->nodes[node_i]->parent;