Board Game Arena

It said mysql error, faction_id is not exist, some error

That could be a game bug. You might get better discussion by posting in the Age of Innovation forum directly. Better yet, if you visit that forum you'll see a big red banner pointing you to a link where you can file an official report for the developer to see, rather than starting a conversation with other players about it.

Sorry, I posted this in the wrong section. Because I'm a programmer and when I saw MYSQL error, I think maybe the website met some problems.
If possible, please feel free to delete or hide this thread.

You may be right -- maybe it's a site-wide issue? But it's probably best to start at the game level and see if the issue is there before escalating. Regardless, I can't delete the thread because I'm just another player like you.