Should i do java record class implement Serialization?

General
1

i did dto Object Cache. error occurred code.

public record EventListCopyResponse(
        Long eventCode,
        String title,
        String content,
        String image,
        String thumbnail,
        String link,
        MemberRole role,
        LocalDateTime createdAt,
        LocalDateTime updatedAt
) {
}

@Override
@Cacheable("event")
public List<EventListCopyResponse> execute(MemberRole role) {
    List<Event> events = loadEventService.findAllByMemberRole(role);
    return eventMapper.toEventListResponse(events);
}

error occurred this code.

java.io.InvalidClassException: com.chaorda.matchuum.api.presentation.information.event.model.response.EventListCopyResponse; class invalid for deserialization

so i did record class implements Serialization

public record EventListCopyResponse(
        Long eventCode,
        String title,
        String content,
        String image,
        String thumbnail,
        String link,
        MemberRole role,
        LocalDateTime createdAt,
        LocalDateTime updatedAt
) implements Serializable {
}

then is works.

as far as I know, java record class already implements Serializable, so why does it have to be implemented explicitly for it to work?

2 
public record EventListCopyResponse(
        Long eventCode,
        String title,
        String content,
        String image,
        String thumbnail,
        String link,
        MemberRole role,
        LocalDateTime createdAt,
        LocalDateTime updatedAt
) implements Serializable {

    private static final long serialVersionUID = 1L; // Ensure this matches across versions

    private void writeObject(ObjectOutputStream oos) throws IOException {
        oos.defaultWriteObject(); // Or custom serialization logic
    }

    private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
        ois.defaultReadObject(); // Or custom deserialization logic
    }
}