### 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)

} else if (p.name.begins_with("metadata/_") || !(p.usage & PROPERTY_USAGE_EDITOR) || _is_property_disabled_by_feature_profile(p.name) || (restrict_to_basic && !(p.usage & PROPERTY_USAGE_EDITOR_BASIC_SETTING))) {
			
			continue;
		}
		if (p.name == "script") {
			
			category_vbox = nullptr;
		}
		if (p.usage & PROPERTY_USAGE_HIGH_END_GFX && RS::get_singleton()->is_low_end()) {
			
			continue;
		}
		if (p.name == "script" && (hide_script || bool(object->call("_hide_script_from_inspector")))) {
			
			continue;
		}
		if (p.name.begins_with("metadata/") && bool(object->call("_hide_metadata_from_inspector"))) {
			
			continue;
		}
		
		String path = p.name;
		
		String array_prefix = "";
		int array_index = -1;
		for (KeyValue<String, EditorInspectorArray *> &E : editor_inspector_array_per_prefix) {
			if (p.name.begins_with(E.key) && E.key.length() > array_prefix.length()) {
				array_prefix = E.key;
			}
		}