StaleStateException when saving an object with complex relationships

The sleeping object that I store in the database (Oracle) has a very complex relationship in the sense that it has many related objects. It looks something like this ...

@Table(name = "t_HOP_CommonContract")
public class Contract {
    @Id
    private ContractPK id;

    @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
    @PrimaryKeyJoinColumn
    private ContractGroupMember contractGroupMember;

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
    @JoinColumns({
        @JoinColumn(name = "TransactionId", referencedColumnName = "TransactionId"),
        @JoinColumn(name = "PrimaryContractId", referencedColumnName = "PrimaryContractId")
    })
    @Fetch(FetchMode.SUBSELECT)
    private List<ContractLink> contractLinks;

    // . . . . . . . 

    // A couple of more one to many relationships

    // Entity getters etc.

}

I also have several other objects, such as ...

@Table(name = "t_HOP_TRS")
public class TotalReturnSwap {
    @Id
    private ContractPK id;
    // Entity Getters etc.
}

The trick is that I have to perform the constancy of objects Contractand TotalReturnSwapin the same transaction.

Sometimes it can be a bunch of entities that must be stored in a single transaction.

I noticed the following exception when I save the object TotalReturnSwap(which is always executed after I save the object Contract).

org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1; nested exception is
    org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
    at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:675) \
    at org.springframework.orm.hibernate3.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:793) 
    at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:664) 
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754) 
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723) 
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:147) 
    at com.rbs.fcg.publishing.DownstreamContractBusinessEventPostingService.performTDWPersistenceForContracts(DownstreamContractBusinessEventPostingService.java:102) 
    at com.rbs.fcg.publishing.DownstreamContractBusinessEventPostingService.persistContractBusinessEvent(DownstreamContractBusinessEventPostingService.java:87)
    at com.rbs.fcg.publishing.DownstreamContractBusinessEventPostingService.publish(DownstreamContractBusinessEventPostingService.java:67)
    at com.rbs.fcg.publishing.PublishingProcessor.publish(PublishingProcessor.java:76)
    at com.rbs.fcg.publishing.PublishingProcessor.process(PublishingProcessor.java:52)
    at com.rbs.are.MultiThreadedQueueItemProcessor$2.run(MultiThreadedQueueItemProcessor.java:106)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
Caused by: org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
    at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:85)
    at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:70)

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