### 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)

ep->property = F.properties[0];
					ep->property_path = property_prefix + F.properties[0];
					ep->property_usage = 0;
				}
				if (!F.label.is_empty()) {
					ep->set_label(F.label);
				}
				for (int i = 0; i < F.properties.size(); i++) {
					String prop = F.properties[i];
					if (!editor_property_map.has(prop)) {
						editor_property_map[prop] = List<EditorProperty *>();
					}
					editor_property_map[prop].push_back(ep);
				}
			}
			if (p_section) {
				ep->connect("property_can_revert_changed", callable_mp(p_section, &EditorInspectorSection::property_can_revert_changed));
			}
			ep->set_read_only(read_only);
			ep->update_property();
			ep->_update_pin_flags();
			ep->update_editor_property_status();
			ep->set_deletable(deletable_properties);
			ep->update_cache();
		}
	}
	ped->added_editors.clear();
}
bool EditorInspector::_is_property_disabled_by_feature_profile(const StringName &p_property) {