如何在双向关联中使用版本控制Spring数据JPA？

Question

假设我在Parent-Child之间具有双向一对多关联，映射如下：

public class TradingAccount {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private Long id;
  @OneToMany(mappedBy = "tradingAccount", cascade = CascadeType.ALL, orphanRemoval = true)
  private List<UnderlyingPerTradingAccount> underlyingPerTradingAccounts;
  @Version
  private Long version;
}

和

public class UnderlyingPerTradingAccount {
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)
  private Long id;
  @ManyToOne
  private TradingAccount tradingAccount;
  private Boolean enableBuy;
  private Boolean enableSell;
}

现在当我更新TradingAccount这个例外时我得到例外：

对象引用未保存的瞬态实例 - 在刷新之前保存瞬态实例