mongo Cannot autogenerate id of type java.lang.Object for entity of type com.tycoon.frame.entity.Transaction!

1、mongo集群存入实体类数据报错 ：  Cannot autogenerate id of type java.lang.Object for entity of type com.tycoon.frame.entity.Transaction!

2、通过排查实体类 Transaction 的 定义的Object 为java Class Object is the root of the class hierarchy. Every class has Object as a superclass. All objects,

   修改错误前：

@Data
@Document(collection = "Transaction")
public class Transaction{

    // 单机情况下使用没问题
    private Object _id;

    ......
}
正确写法应该写为：

import org.bson.types.ObjectId;
import org.springframework.data.mongodb.core.mapping.Document;
import java.util.List;

@Data
@Document(collection = "Transaction")
public class Transaction{
    //  Cannot autogenerate id of type java.lang.Object for entity of type com.tycoon.frame.entity.Transaction
    // private Object _id;  

    private ObjectId _id; # 正确写法
    
    ......

}