如何使用与ManyToMany关系的级联

Question

我正在尝试与多对多关系的级联，我有两个类Employee和Meeting，它们被映射如下

Employee.java
@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinTable(name = "EMPLOYEE_MEETING", joinColumns = {@JoinColumn(name = "EMPLOYEE_ID")}, inverseJoinColumns = {@JoinColumn(name = "MEETING_ID")})
    private List<Meeting> meetings = new ArrayList<>();

Meeting.java
  @ManyToMany(mappedBy = "meetings", cascade = CascadeType.ALL)
    private List<Employee> employees = new ArrayList<>();

使用Insert工作正常，但当我删除单个实体时，如

Employee employee = entityManager.find(Employee.class, 1);
entityManager.getTransaction().begin();
entityManager.remove(employee);
entityManager.getTransaction().commit();

删除与该员工相关的所有会议，然后再删除与会议相关的所有员工。

所以我在这里很困惑如何使用具有多对多关系的级联？