I'm trying to map a one-to-one relationship. One of the sides is a inheritance (table for class hierarchy). So, I have the follow:

<hibernate-mapping>
<class name="dto.Concreto" table="Concreto">

<id name="codigoConc" column="codigo_conc" type="java.lang.Integer" unsaved-value="0" >
<generator class="native"/>
</id>

<discriminator column="concreto_type" type="java.lang.String"/>

<property ...

<subclass
name="dto.ConcretoF13"
discriminator-value="FCK13">
<property ...
</subclass>

<subclass
name="dto.ConcretoF15"
discriminator-value="FCK15">
<property ...
</subclass>

<subclass
name="dto.ConcretoF18"
discriminator-value="FCK18">
<property ...
</subclass>
</class>

It's working.
The other side is:

<class name="dto.Item_Compra" table="Item_Compra">

<id ...

<property ...

<one-to-one name="concreto" class="dto.Concreto"/>

</class>

I'm receiving the follow error message:

Initial SessionFactory creation failed.org.hibernate.MappingException: broken column mapping for: concreto.id of: dto.Item_Compra
Exception in thread "AWT-EventQueue-0" java.lang.ExceptionInInitializerError
at dto.HibernateUtil.<clinit>(HibernateUtil.java:20)
at dao.CompraDAO.getCompras(CompraDAO.java:16)
at view.Simulador.jButton1ActionPerformed(Simulador.java:72)
at view.Simulador.access$0(Simulador.java:65)
at view.Simulador$1.actionPerformed(Simulador.java:42)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener$Actions.actionPerformed(Unknown Source)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: org.hibernate.MappingException: broken column mapping for: concreto.id of: dto.Item_Compra
at org.hibernate.persister.entity.AbstractPropertyMapping.initPropertyPaths(AbstractPropertyMapping.java:122)
at org.hibernate.persister.entity.AbstractPropertyMapping.initIdentifierPropertyPaths(AbstractPropertyMapping.java:176)
at org.hibernate.persister.entity.AbstractPropertyMapping.initPropertyPaths(AbstractPropertyMapping.java:160)
at org.hibernate.persister.entity.AbstractEntityPersister.initOrdinaryPropertyPaths(AbstractEntityPersister.java:1585)
at org.hibernate.persister.entity.AbstractEntityPersister.initPropertyPaths(AbstractEntityPersister.java:1613)
at org.hibernate.persister.entity.AbstractEntityPersister.postConstruct(AbstractEntityPersister.java:2610)
at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:386)
at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:215)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1154)
at dto.HibernateUtil.<clinit>(HibernateUtil.java:16)
... 33 more

What's wrong?

PS: sorry for my bad english.