如何深度复制一个实体，不包括它的关系的id？

public class Entity {
    private int id;
    private String name;
    private List<RelatedEntity> relatedEntities;

    // 省略构造方法和其他方法

    public Entity deepCopy() {
        Entity newEntity = new Entity();
        newEntity.setName(this.name);

        List<RelatedEntity> newRelatedEntities = new ArrayList<>();
        for (RelatedEntity relatedEntity : this.relatedEntities) {
            RelatedEntity newRelatedEntity = new RelatedEntity();
            newRelatedEntity.setName(relatedEntity.getName());
            // 复制其他属性

            newRelatedEntities.add(newRelatedEntity);
        }
        newEntity.setRelatedEntities(newRelatedEntities);

        return newEntity;
    }
}

public class RelatedEntity {
    private int id;
    private String name;

    // 省略构造方法和其他方法

    // getter和setter方法
}