[Konstantinos]

pawn Код:

SetPlayerName(targetid,name);
udb_RenameUser(PlayerName(targetid),name);

It sets the new name to the player and then you force it to rename the new name (PlayerName returns the new name) with the new name? It seems legit.

Either use it with the opposite way:

pawn Код:

udb_RenameUser(PlayerName(targetid),name);
SetPlayerName(targetid,name);

or use frename.