### Godot version

v4.0.beta17.mono.official [c40020513]

### System information

Window 11, Forward+, GTX 1060

### Issue description

Adding two theme variations in a row result to a  crash.

https://user-images.githubusercontent.com/93253123/217037249-1ce1d56d-beb6-4435-83ad-9f8a07fe0e96.mp4



### Steps to reproduce

1. Create a project.
2. Create a theme.
3. Double click to go in the theme editor.
4. Click on manage items buttons.
5. In the add type field type a name to add a type.
6. type another name to add a second type.
7. Crash.

### Minimal reproduction project

[ThemeVariationCrash.zip](https://github.com/godotengine/godot/files/10665863/ThemeVariationCrash.zip)

if (!object) {
		return;
	}
	
	const Variant args[3] = { p_path, p_value, p_advance };
	const Variant *argp[3] = { &args[0], &args[1], &args[2] };
	emit_signalp(SNAME("property_keyed"), argp, 3);
}
void EditorInspector::_property_checked(const String &p_path, bool p_checked) {
	if (!object) {
		return;
	}
	
	if (autoclear) {
		if (!p_checked) {
			object->set(p_path, Variant());
		} else {
			Variant to_create;
			List<PropertyInfo> pinfo;
			object->get_property_list(&pinfo);
			for (const PropertyInfo &E : pinfo) {
				if (E.name == p_path) {
					Callable::CallError ce;
					Variant::construct(E.type, to_create, nullptr, 0, ce);
					break;
				}
			}
			object->set(p_path, to_create);
		}
		if (editor_property_map.has(p_path)) {