I get this message when I try to insert the second class (child).
But the Id of the Child is a foreign key to the Parent Id, then the Id need to be the same and when I try to insert I receive this:

NHibernate.ADOException: Could not save object ---> NHibernate.HibernateException: The generated identifier is already in use: [SisImob.Database.ClienteEndereco#28] at NHibernate.Impl.SessionImpl.DoSave(Object obj, Object id, IClassPersister persister, Boolean useIdentityColumn, CascadingAction cascadeAction, Object anything) at NHibernate.Impl.SessionImpl.SaveWithGeneratedIdentifier(Object obj, CascadingAction action, Object anything) --- End of inner exception stack trace --- at NHibernate.Impl.SessionImpl.SaveWithGeneratedIdentifier(Object obj, CascadingAction action, Object anything) at NHibernate.Impl.SessionImpl.Save(Object obj) at SisImob.Database.Services.WsCliente.InserirClienteFisico(Cliente cl, ClienteFisico cf, ClienteConjuge cj, ClienteEndereco cend) in E:\Projetos\VisualC#\SisImob\SisImob\Services\WsCliente.cs:line 34

Anyone has one idea?

You are apparently saving two objects of the same class with the same id. Why are you doing this? Maybe you need to call update the second time?

No! I had 2 classes.

But I find the problem, I don't get to make work the bidirecional one-to-one, but the unidirectional one-to-one works now.

The problem description is in the topic forum Mapping one-to-one, that is a little below in the general Support. Give a look there, you will understand what I was trying to do.

But now IT WORKS AEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

THANKS