Problemas com hibernate. delete() ony-to-many

[rafael_raPJ]

Pessoa to com o seguinte problema, quando vou deletar um objeto que já existe relacionamento em outras tabelas ocorre o seguinte erro!

Hibernate: /* delete one-to-many modelo.Anamnese.anamneseRecordatorio */ update anamnese_recordatorio set anamnese_id=null where anamnese_id=? (util.JDBCExceptionReporter 77 ) SQL Error: 0, SQLState: 22001 (util.JDBCExceptionReporter 78 ) Data truncation: Column was set to data type implicit default; NULL supplied for NOT NULL column 'anamnese_id' at row 1

abaixo segue meus arquivos .hbm

[code]<hibernate-mapping
>
<class
name="modelo.AnamneseRecordatorio"
table="anamnese_recordatorio"
>

    <id
        name="id"
        column="id"
        type="java.lang.Integer"
    >
        <generator class="increment">
          <!--  
              To add non XDoclet generator parameters, create a file named 
              hibernate-generator-params-AnamneseRecordatorio.xml 
              containing the additional parameters and place it in your merge dir. 
          --> 
        </generator>
    </id>

    <property
        name="refeicao"
        type="java.lang.String"
        update="true"
        insert="true"
        column="refeicao"
    />

    <property
        name="alimento"
        type="java.lang.String"
        update="true"
        insert="true"
        column="alimento"
    />

    <property
        name="medida"
        type="java.lang.String"
        update="true"
        insert="true"
        column="medida"
    />

    <property
        name="quantidade"
        type="java.lang.String"
        update="true"
        insert="true"
        column="quantidade"
    />

    <many-to-one
        name="anamnese"
        class="modelo.Anamnese"
        cascade="delete"
        outer-join="auto"
        update="true"
        insert="true"
        column="anamnese_id"
        not-null="true"
    />

</class>

</hibernate-mapping>[/code]

[code]<hibernate-mapping
>
<class
name="modelo.Anamnese"
table="anamneses"
>

    <id
        name="id"
        column="id"
        type="java.lang.Integer"
    >
        <generator class="increment">
          <!--  
              To add non XDoclet generator parameters, create a file named 
              hibernate-generator-params-Anamnese.xml 
              containing the additional parameters and place it in your merge dir. 
          --> 
        </generator>
    </id>

    <property
        name="pacienteID"
        type="java.lang.Integer"
        update="true"
        insert="true"
    >
        <column
            name="pacientes_id" 
        />
    </property>

    <property
        name="ADF"
        type="java.lang.Integer"
        update="true"
        insert="true"
    >
        <column
            name="ADF" 
        />
    </property>

    <property
        name="AQ"
        type="java.lang.Integer"
        update="true"
        insert="true"
    >
        <column
            name="AQ" 
        />
    </property>

    <many-to-one
        name="consulta"
        class="modelo.Consulta"
        cascade="none"
        outer-join="auto"
        update="true"
        insert="true"
        column="consultas_id"
        not-null="true"
    />

    <set
        name="anamneseRecordatorio"
        lazy="false"
        cascade="delete-orphan"
        sort="unsorted"
    >

        <key
            column="anamnese_id"
        >
        </key>

        <one-to-many
              class="modelo.AnamneseRecordatorio"
        />

    </set>

</class>

</hibernate-mapping>[/code]
Ele da o erro pq tenta dar um update na tabela sem o id? alguem consegue ver o motivo do problema?