### Godot version

4.1.beta (7b1387ff2)

### System information

Mageia 9, Linux

### Issue description

When opening an empty project in latest `master`, I get these errors:
```
ERROR: Index p_idx = -1 is out of bounds (edited_scene.size() = 1).
   at: get_scene_path (editor/scu/../editor_data.cpp:880)
ERROR: Index p_idx = -1 is out of bounds (edited_scene.size() = 1).
   at: check_and_update_scene (editor/scu/../editor_data.cpp:683)
ERROR: Index p_idx = -1 is out of bounds (edited_scene.size() = 1).
   at: set_edited_scene (editor/scu/../editor_data.cpp:745)
```

Possibly related to recent changes to restore past sessions, but there's nothing to restore in this case?

### Steps to reproduce

- Create a new project, edit it
- Quit to project manager
- Re-open the newly created project -> errors

### Minimal reproduction project

Empty project.
String current_renderer = GLOBAL_GET("rendering/renderer/rendering_method");
	PackedStringArray renderers = ProjectSettings::get_singleton()->get_custom_property_info().get(StringName("rendering/renderer/rendering_method")).hint_string.split(",", false);
	
	
	current_renderer = current_renderer.to_lower();
	for (int i = 0; i < renderers.size(); i++) {
		String rendering_method = renderers[i];
		
		if (rendering_method == "forward_plus") {
			renderer->add_item(TTR("Forward+"));
		}
		if (rendering_method == "mobile") {
			renderer->add_item(TTR("Mobile"));
		}
		if (rendering_method == "gl_compatibility") {
			renderer->add_item(TTR("Compatibility"));
		}
		renderer->set_item_metadata(i, rendering_method);
		
		rendering_method = rendering_method.to_lower();
		if (current_renderer == rendering_method) {
			renderer->select(i);
			renderer_current = i;
		}
	}
	_update_renderer_color();
	video_restart_dialog = memnew(ConfirmationDialog);
	video_restart_dialog->set_text(TTR("Changing the renderer requires restarting the editor."));
	video_restart_dialog->set_ok_button_text(TTR("Save & Restart"));
	video_restart_dialog->connect("confirmed", callable_mp(this, &EditorNode::_menu_option).bind(SET_RENDERER_NAME_SAVE_AND_RESTART));