Can't insert newly created entity if create an entity using new(id: ID?, ...) and refresh it

[socar-brad]

I can't insert newly created entity if create an entity using new(id: ID?, ...) and refresh it.

val x = Human.new(2) {
    h = "foo"
}
x.refresh(flush = true)

I think that fixing some logics checks if entity is created(e.g. id._value == null) will fix the bug.