### 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 (GLTFNodeIndex node_i = 0; node_i < p_state->nodes.size(); node_i++) {
		for (int j = 0; j < p_state->nodes[node_i]->children.size(); j++) {
			GLTFNodeIndex child_i = p_state->nodes[node_i]->children[j];
			ERR_FAIL_INDEX(child_i, p_state->nodes.size());
			if (p_state->nodes.write[child_i]->parent != -1) {
				continue;
			}
			p_state->nodes.write[child_i]->parent = node_i;
		}
	}
}
Vector<Ref<GLTFDocumentExtension>> GLTFDocument::all_document_extensions;
void GLTFDocument::register_gltf_document_extension(Ref<GLTFDocumentExtension> p_extension, bool p_first_priority) {
	if (all_document_extensions.find(p_extension) == -1) {
		if (p_first_priority) {
			all_document_extensions.insert(0, p_extension);
		} else {
			all_document_extensions.push_back(p_extension);
		}
	}
}
void GLTFDocument::unregister_gltf_document_extension(Ref<GLTFDocumentExtension> p_extension) {
	all_document_extensions.erase(p_extension);
}
void GLTFDocument::unregister_all_gltf_document_extensions() {