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kotlinlang

Hmm, I have a question…
For example, I've got a model:
```
@Entity
public class Something {
    @Id
    @GeneratedValue(generator = "uuid2")
    @GenericGenerator(name = "uuid2", strategy = "uuid2")
    public UUID id;

    @NotNull @Column(columnDefinition = "TEXT")
    public String text;
}
```, a form with the only field `text`, and a controller method:
`String addSomething(@ModelAttribute Something something) { somethingRepository.save(something); }`

If a user adds `id=00000000-0000-0000-0000-000000000000` to his request, and a model with such id already exists, will Hibernate update an existing model? How we can close this security hole?
~Actually, we could null out all fields that are not in the form, but it is awful.~