Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1

问题描述：

用jpa删除数据库记录报错：

org.springframework.orm.jpa.JpaSystemException: Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1; nested exception is org.hibernate.jdbc.BatchedTooManyRowsAffectedException: Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1

Caused by: org.hibernate.jdbc.BatchedTooManyRowsAffectedException: Batch update returned unexpected row count from update [0]; actual row count: 2; expected: 1

修改前代码：

Dao层：

@Repository
public interface FtFileInfoDAO extends JpaRepository<FtFileInfoDO, BigInteger> {

    List<FtFileInfoDO> findAllByDataId(Long dataId);

    @Transactional
    Long deleteByDataId(Long dataId);

}

Entity层：

@Entity
@Table(name = "ft_file_info")
@Data
public class FtFileInfoDO {
    @Id
    /**
     * 数据