void convert_quests(player) {
	local new_quests = {}
	local quest_entries = {}
	local quest_data = {}

	for quest, progress in player.quest {
		local quest_definition = find_quest_data(quest)
		if not quest_definition {
			continue;
		}
		if get_level(player) > quest_definition.level_expire {
			continue;
		}
		local quest_object = {
			uuid = generate_uuid(),
			id = quest_definition.id
		}
		local data = {}
		quest_data[quest_object.uuid] = data
		quest_entries.push_back(quest_object)
		if quest_definition.is_accumulate {
			data.progress = progress
		} else {
			data.best = progress
		}
		if quest_definition.tutorial_marker {
			update_tutorial_progress(player, quest_definition.tutorial_marker, progress)
		}
		if quest_definition.goal <= progress {
			complete_quest_and_give_reward(player, quest_object.id)
		}
	}

	player.quests = nil
	player.quest_entries = quest_entries;
	player.quest_data = quest_data;
}