---
url: /blog/gpf30x8g/index.md
---
当在映射实体中使用了多个 @TableId 注解标注字段，则会出现如下错误：
![image-20241222215118068](./MyBatisPlus的@TableId不能设置多个.assets/image-20241222215118068.png)

修改如下：

```java
@TableName(value ="r_notify_forum")
@Data
public class NotifyForumPO implements Serializable {

    @TableId // [!code --]
    @TableField// [!code ++]
    private Long notifyId;


    @TableId // [!code --]
    @TableField// [!code ++]
    private Long forumId;

    @TableField(exist = false)
    private static final long serialVersionUID = 1L;
}
```