[Serial Problem]

please can someone help me ?

[Serial Problem]

Hello MTA Sa STAFF I Need Your Help I Have Problem In My Serial i want join in a servers when i want creat account it's saying you alreadly have account  the problem that i don't have account yet 

so i can't play in the server

i hope you change my server because the 90% of servers i can't play in it because the say you areadly have account 

my old serial : 

 CAC8AC94A7799C062CA8F7FC131789A1