After viewing some acceptable reason from Dimode, I agree with that, restart the game. Moreover, he said it will be some new features, I could not agree more. But I have some points here:
I saw some unfair solution for player who spend thousands RPs for this game since years ago. You should give them back ALL of their RPs they spent, so they have same chance to get some items they want (.XG item and Pet, for example). Its really not fair to IGNORE their PARTICIPATION with spending those RPs since a long time ago, they already support this game with a lot of money, you MUST remember and appreciate them! That was real money, not just game.
Second thing, do not wipe guild, friend list, couples, (or other things may related to relationship), would you? A lot of players are really love to chat with other players, if it gone, absolutely they will not play this game again. Its hard to start friendships/ relationships, right?
Other thing you need to think about, make sure you and other GM are hard-work enough to make sure it will not happen the same things few years later..
God bless you GM's, I'll pray for you for this case