I have a mapping that looks like this:

<hibernate-mapping>

<class name="KeyManagement" table="KEY_MANAGEMENT">
<id name="id" column="KEY_MANAGEMENT_ID">
<generator class="native"/>
</id>
<property name="keyValue" type="string" column="KEY_VALUE" not-null="true"/>

<one-to-one name="entity" class="Entity"/>
</class>

</hibernate-mapping>

When I execute this code, the field ENTITY_ID in KEY_MANAGEMENT receives only a NULL value

KeyManagement km = new KeyManagement();
km.setEntity(ent);
session.save(km);

Where ent has already been saved in a previous transaction. Does anyone have any idea what might be going wrong with my one-to-one relationship here? I have successfully handled similar things with many-to-one relationships before, but for some reason, this is getting ignored.

Any help would be greatly appreciated!