Developer scores: rename every score posted under an old developer name to Maestro.
Privacy move (one time): copy every old score and practice time into its class, then remove the old practice rows that show a class code. Run it once, after the new rules are pasted and the games are published.
Privacy move (one time): copy every old score and practice time into its class, then remove the old practice rows that show a class code. Run it once, after the new rules are pasted and the games are published.