### 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


disjoint_set.get_representatives(out_owners);
	Vector<GLTFNodeIndex> out_roots;
	for (int i = 0; i < out_owners.size(); ++i) {
		Vector<GLTFNodeIndex> set;
		disjoint_set.get_members(set, out_owners[i]);
		const GLTFNodeIndex root = _find_highest_node(p_state, set);
		ERR_FAIL_COND_V(root < 0, FAILED);
		out_roots.push_back(root);
	}
	out_roots.sort();
	ERR_FAIL_COND_V(out_roots.size() == 0, FAILED);
	
	ERR_FAIL_COND_V(out_roots.size() != p_skin->roots.size(), FAILED);
	for (int i = 0; i < out_roots.size(); ++i) {
		ERR_FAIL_COND_V(out_roots[i] != p_skin->roots[i], FAILED);
	}
	
	if (out_roots.size() == 1) {
		return OK;
	}
	
	const GLTFNodeIndex parent = p_state->nodes[out_roots[0]]->parent;
	for (int i = 1; i < out_roots.size(); ++i) {
		if (p_state->nodes[out_roots[i]]->parent != parent) {
			return FAILED;
		}
	}
	return OK;
}
Error GLTFDocument::_parse_skins(Ref<GLTFState> p_state) {