                        课程
                    
                        /后端开发
                        
                            /Java
                        
                        /Hibernate初探之一对多映射

Exception in thread "main" org.hibernate.HibernateException: identifier of an instance of com.imooc.entity.Student was altered from 1 to 0

Exception in thread "main" org.hibernate.HibernateException: identifier of an instance of com.imooc.entity.Student was altered from 1 to 0 有谁知道怎么回事吗，找了各种资料都找不出问题所在