I have only set a reg lock pin. I never set any other pin. Then I uninstalled the app. Now when I installed it again today it is asking me for a PIN and the onl

I have only set a reg lock pin. I never set any other pin. Then I uninstalled the app. Now when I installed it again today it is asking me for a PIN and the only PIN on Signal I have set was a reg lock pin which is not being accepted. I remember the PIN and it's also stored in BitWarden and KeePass. Now I am locked out.