Change AppEngine DataStore Primary Key

Question

I'm using JPA and for the primary key i have:

@Id
private String emailAddress;

Is it possible to update primary key emailAddress?

Answer 1

Not supported. at all. DataNucleus internals would almost certainly reject such a change.

Answer 2

Although this might be supported it is very dangerous, you better off crating a new kind of entity and replacing your existing objects with it.