JPA：许多与许多关系无法正常工作

Question

我有两个以下实体，指令包含许多银行账户，而银行账户属于一个或多个指派。

@Entity
public class AssignIbanEntity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    private String assignmentIbanId;

    @ManyToMany(mappedBy = "assignIbans", cascade = CascadeType.ALL)
    private Set<BankAccountEntity> bankData;

    public void addBankData(BankAccountEntity bankData) {
        if (this.bankData == null) {
            this.bankData = new HashSet<>();
        }
        this.bankData.add(bankData);
        if (CollectionUtils.isEmpty(bankData.getAssignIbans())) {
            bankData.assignIbans(new HashSet<>());
        }
        bankData.getAssignIbans().add(this);
    }
    
}

@Entity(name = "bank_datay")
public class BankAccountEntity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    private String bankDataId;

    @JsonIgnore
    @ManyToMany(cascade = CascadeType.ALL)
    @JoinTable(name = "bank_account_assignment_iban", joinColumns = {
            @JoinColumn(name = "fk_bank_account") }, inverseJoinColumns = { @JoinColumn(name = "fk_assignment_iban") })
    private Set<AssignIbanEntity> assignIbans;
    
}

在我的数据库中，我有以下数据：

bank_data：

bank_account_assignment_iban：

带有以下代码我获得ID 8AA2AFBF F079-44A3-9940 -84DD01A97F7F ，我将其添加到具有ID 87F6F8AC-FD51-493D-860B-F6975FAAEA472 的存在的赋值班

AssignIbanEntity assignIban = assignmentIbanRepository.findById("87f6f8ac-fd51-493d-860b-f6975faea472");
bankDataEntity bankData = bankDataRepository.findById("8aa2afbf-f079-44a3-9940-84dd01a97f7f");
if (Objects.nonNull(assignIban) && Objects.nonNull(bankData)) {
    assignIban.addBankData(bankData);
    assignmentIbanRepository.save(assignIban);
}

问题上，问题是我无法正确的结果：

预期结果：