I am using the one to many mapping between two tables

<bag name="details" cascade="all">
<key column="vod_vtr_id"/>
<one-to-many class="org.youthnet.doit.domain.VolunteerDetails"/>
</bag>

In the second mapping

<id name="detailsId" type="long" unsaved-value="0">
<column name="vod_vtr_id" sql-type="number" not-null="true"/>
<generator class="foreign"/>
<param name="property">volunteer</param>-
</generator>
</id>

<property name="detailsLKTId">
<column name="vod_lkt_id" sql-type="number" not-null="true"/>
</property>
<property name="detailsLKPId">
<column name="vod_lkp_id" sql-type="number" not-null="true"/>
</property>

<many-to-one name="volunteer" column="vod_vtr_id" insert="false" update="false"/>

The code to pull out the data from the collection

Collection col = vol.getDetails();
Iterator iter = col.iterator();
VolunteerDetails vd = new VolunteerDetails();
while(iter.hasNext())
{

vd = (VolunteerDetails) iter.next();
System.out.println("vod id = " + vd.getDetailsId());
System.out.println("lkt id = " + vd.getDetailsLKTId());
System.out.println("lkp id = " + vd.getDetailsLKPId());
}

The resulting output gets me the correct number of objects from the database but the data in the collection is duplicated.

To get the correct data do i need to have a unique key(sequence). As a test i added a column to the database which had unique id's and then i got the correct information.

However is there a way to get the correct data without doing this?

Any help will be appreciated

Oli