ssh转账时,插入两条数据进表,并更新数据

private void turnIn(String toCardno, float money) {        accountDao.turnIn(toCardno, money);        //转入账户        float balance=accountDao.getBalance(toCardno);        System.out.println("转入账户余额="+balance);        Transaction transaction=new Transaction();        Date date=new Date();        transaction.setCardno(toCardno);        transaction.setTransaction_date(date);        transaction.setExpense(money);        transaction.setBalance(balance);        transaction.setTransaction_type("转入");        System.out.println("执行插入insertRecord");        transactionDao.insertRecord(transaction);    }

出现这个问题

org.springframework.dao.DuplicateKeyException: A different object with the same identifier value was already associated with the session : [entity.Transaction#0]; nested exception is

org.hibernate.NonUniqueObjectException: A different object with the same identifier value was already associated with the session : [entity.Transaction#0]

但是,我在实体类上加上 –红色的部分

即主键的生成策略后就不报错了

@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE)
@Column(name = “id”)
private int id;