在我的项目中，我有events实体和mylocation实体。
mylocation id是event.eventstarttime（isostring）+event.eventname，当我尝试更新事件名称（不再与mylocation字符串名称相关）时遇到问题，错误如下：

Violation of PRIMARY KEY constraint 'PK__my_locat__72E12F1A88A314B4'. Cannot insert duplicate key in object 'dbo.my_location'. The duplicate key value is (2020-06-25T14:00:01.235ZWeddingT&Z).

代码如下：

@Entity
@Table(name = "Events")
public class Event {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private long eventID;
    @Column(nullable = false)
    private String eventName;
    @OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    private MyLocation eventLocation;
    @column
    private TimeStamp eventStartTime;
    ....

@Entity
public class MyLocation {
    @Id
    private String name;
    @Column
    private double longitude;
    @Column
    private double latitude;
    .....

问题是否与mylocation中的@id有关？或者其他解决方案？