handouts deleted by a person who is not allowed to edit it

I had an older player who can see handouts as he had quit the game. Now many handouts were deleted with Loading... in text for player and Loading... tiens connard in GM notes. how can i protect my game?

I'd report this to roll20 (email: <a href="mailto:team@roll20.net" rel="nofollow">team@roll20.net</a>) with the name of the player who did this, and ask them to rollback the campaign before the deletions (and block the character). One thing you can also do is kick a player (any player, one of your regulars, or create a dummy account to do this with), and then reinvite them. Whenever you kickj a player, it regenerates the game id, so anyone with the old link cant rejoin.

thanks for help, i already kick after him others players who never play, so the link had already changed.