LOL Kenta! That doesn't fix anything. It's still broke.
This is extremely common with these PoW/PoS coins.
What is the code base for this coin?
It is broke. Fix your checkpoints, comedy.
Now, this getting interesting! How can we do that? Is that something we can do from user side or will we need a new wallet/fork?
I would have expected dev to be online when going from POW to POS, but he's obviously busy...?