### 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.
p_ownership_table.insert(p_current_node, p_current_node->get_owner());
	for (int i = 0; i < p_current_node->get_child_count(); i++) {
		Node *child = p_current_node->get_child(i);
		update_ownership_table_for_addition_node_ancestors(child, p_ownership_table);
	}
}
void EditorNode::update_diff_data_for_node(
		Node *p_edited_scene,
		Node *p_root,
		Node *p_node,
		HashMap<NodePath, ModificationNodeEntry> &p_modification_table,
		List<AdditiveNodeEntry> &p_addition_list) {
	bool node_part_of_subscene = p_node != p_edited_scene &&
			p_edited_scene->get_scene_inherited_state().is_valid() &&
			p_edited_scene->get_scene_inherited_state()->find_node_by_path(p_edited_scene->get_path_to(p_node)) >= 0;
	
	Node *valid_node_owner = p_node->get_owner();
	while (valid_node_owner) {
		if (valid_node_owner == p_root) {
			break;
		}
		valid_node_owner = valid_node_owner->get_owner();
	}
	if ((valid_node_owner == p_root && (p_root != p_edited_scene || !p_edited_scene->get_scene_file_path().is_empty())) || node_part_of_subscene || p_node == p_root) {