TShock error message on logout

[metroFIRE]

Whenever I log out of my account on my server it has an error message in the console saying:
[Server API] Warning Plugin "TShock" has had an unhandled exception thrown by one of its GameUpdate handlers: System.NullReferenceException: Object reference not set to an instance of an object. at TShockAPI.TSPlayer.HasPermission(String permission) at TShockAPI.TShock.OnSecondUpdate() at TShockAPI.TShock.OnUpdate(EventArgs args) at TerrariaApi.Server.HandlerCollection`1.Invoke(ArgsType args) in D:\a\TShock\TShock\TerrariaServerAPI\TerrariaServerAPI\TerrariaApi.Server\HandlerCollection.cs:line 109
and it will just spam this same message (my log has about 143748 lines in it!) and when I try to join back and login it just says I'm already logged in. I can't even give myself perms!! I'm locked out of my account!

[metroFIRE]

Nevermind. I just figured out why while looking at the TShock config list (https://tshock.readme.io/docs/config-settings) It was because I changed the name of the "guest" group and when I logged out it didn't know where to put me because there was no "guest" group.