Turn rollback ramifications

[Muse]

Say, would it be possible to make rollbacks completely safe by simply auto-creating a new game iteration for each rollback?
IE-- the turn file is resent, and only turns done for the new file are accepted.
Everyone would have to re-do the turn, but it shouldn't be possible for overlap troubles to occur.

Perhaps a requirement to place the game-name (for the new iteration) in the e-mail subject would be useful.

I am aware that the Llamaserver determines game-identity from the 2h itself, but I am not certain how that is done. Perhaps a hash in the 2h?