§ 203. Effect of judgment in favor of people. A final judgment in favor of the people in an action authorized as set forth in section two hundred one is conclusive as to the title of the people in and to the premises described in said judgment against any and all parties in said action, including unknown defendants, and against any and all persons claiming from, through or under such a party by title accruing after the filing of the judgment roll or after the filing in the office of the clerk of the county in which said real property or a part thereof is situated, a notice of the pendency of the action.