Hello!

I'm new to Hibernate and I'm having a problem with deleting an object from the database

I'm getting the following exception..org.hibernate.exception.ConstraintViolationException: Integrity constraint violation


Here it is my mapping file..

<class entity-name "toto" table="TOTO">
<id access=field column="TOTO_ID" type="string">
<generator class="uuid"/>
</id>
<list access="field" cascade="save-update,all-delete-orphan" lazy="false" name="titis" inverse="false">
<key column="TOTO_ID" not-null="true" on-delete="cascade" unique=true"/>
<list-index base="1" column="number"/>
<many-to-many
class=Titi
column="TITI"
entity-name="Titi"
lazy="false" not-found="ignore" unique="false"/>
</list>
</class>
<class dynamic-insert="true" dynamic-update="true"
entity-name="Titi"
lazt="false"
name="Titi"
..
<id access="field" column ="Titi" type="string">
<generator class="uuid"/>
</id>

.....

The relation is unidirectional..
Do you have any ideas of the problem?
Thanks for your time and in advance!