### 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


for (GLTFSkinIndex skin_i = 0; skin_i < p_state->skins.size(); ++skin_i) {
		Ref<Skin> skin = p_state->skins.write[skin_i]->godot_skin;
		if (skin->get_name().is_empty()) {
			
			skin->set_name(_gen_unique_name(p_state, "Skin"));
		}
	}
	return OK;
}
bool GLTFDocument::_skins_are_same(const Ref<Skin> p_skin_a, const Ref<Skin> p_skin_b) {
	if (p_skin_a->get_bind_count() != p_skin_b->get_bind_count()) {
		return false;
	}
	for (int i = 0; i < p_skin_a->get_bind_count(); ++i) {
		if (p_skin_a->get_bind_bone(i) != p_skin_b->get_bind_bone(i)) {
			return false;
		}
		if (p_skin_a->get_bind_name(i) != p_skin_b->get_bind_name(i)) {
			return false;
		}
		Transform3D a_xform = p_skin_a->get_bind_pose(i);
		Transform3D b_xform = p_skin_b->get_bind_pose(i);
		if (a_xform != b_xform) {
			return false;
		}
	}
	return true;
}
void GLTFDocument::_remove_duplicate_skins(Ref<GLTFState> p_state) {