Pretty sure this is your answer:
https://forum.redcountyrp.com/threads/red-county-roleplay-two-accounts-on-one-ip-address.103260/
At me is another problem, I think..
I want to register on UCP ( I don't have an account ) and this appears when I finish my registrationView attachment 30747
Cannot help you further, an admin will have to contact you for that.