### 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


ERR_FAIL_COND_V(root < 0, FAILED);
		out_roots.push_back(root);
	}
	out_roots.sort();
	for (int i = 0; i < out_roots.size(); ++i) {
		_capture_nodes_in_skin(p_state, p_skin, out_roots[i]);
	}
	p_skin->roots = out_roots;
	return OK;
}
Error GLTFDocument::_verify_skin(Ref<GLTFState> p_state, Ref<GLTFSkin> p_skin) {
	
	
	
	
	
	
	DisjointSet<GLTFNodeIndex> disjoint_set;
	Vector<GLTFNodeIndex> all_skin_nodes;
	all_skin_nodes.append_array(p_skin->joints);
	all_skin_nodes.append_array(p_skin->non_joints);
	for (int i = 0; i < all_skin_nodes.size(); ++i) {
		const GLTFNodeIndex node_index = all_skin_nodes[i];
		const GLTFNodeIndex parent = p_state->nodes[node_index]->parent;
		disjoint_set.insert(node_index);
		if (all_skin_nodes.find(parent) >= 0) {
			disjoint_set.create_union(parent, node_index);
		}
	}
	Vector<GLTFNodeIndex> out_owners;