Bug: Duplicate key when use two class with same variable.

[sonvp]

Hi @BoD by default , I have class Worker and Manager, and skip add preference key, using default preference key:

@"Prefs"
class Worker {
 String user;
 String password;
} 

@"Prefs"
class Manager{
 String user;
 String password;
} 

If i save user Worker, then i save user Manager ---> value user, password manager will replace user, password worker. Although i can use @name("........") resolve it . But i don't want.