Spring Boot JSON Вставить в несколько таблиц внешний ключ

Question

у меня 2 таблицы.

1. appuser: appuserid, полное имя, имя пользователя

2. Преподаватель: teacherid, имя, фамилия, appuserid

   public class Teacher {
       @Id
       @GeneratedValue(strategy=GenerationType.AUTO)
       @Column(name = "teacherId" , updatable = false)
       private Long teacherId;
   
       @Column(name= "firstname")
      private String firstName;
   
   
   
    @Column(name = "lastname")
    private String lastName;
   
   @Column(name="designation")
   private String designation;
   
   @JsonBackReference(value = "teacherAppuser")
   @OneToOne(fetch = FetchType.LAZY,cascade = CascadeType.ALL)
   @JoinColumn(name = "appuserId", nullable = false)
   private Appuser appuser;
   
     //    @JsonManagedReference(value = "teacherCourse")
   @OneToMany(cascade = CascadeType.ALL, orphanRemoval=true ,mappedBy="teacher")   
   private List<Course> courses;
   
   public Teacher() {
   }
   
   public Teacher(Long teacherId, String firstName, String lastName, String designation, Appuser appuser,
           List<Course> courses) {
       super();
       this.teacherId = teacherId;
       this.firstName = firstName;
       this.lastName = lastName;
       this.designation = designation;
       this.appuser = appuser;
       this.courses = courses;
   }
   
   
     public Long getTeacherId() {
       return teacherId;
   }
   
   public void setTeacherId(Long teacherId) {
       this.teacherId = teacherId;
   }
   
   public String getFirstName() {
       return firstName;
   }
   
   public void setFirstName(String firstName) {
       this.firstName = firstName;
   }
   
   public String getLastName() {
       return lastName;
   }
   
   public void setLastName(String lastName) {
       this.lastName = lastName;
   }
   
   public String getDesignation() {
       return designation;
   }
   
   public void setDesignation(String designation) {
       this.designation = designation;
   }
   
   public Appuser getAppuser() {
       return appuser;
   }
   
   public Long getAppuserId(){
       return appuser.getAppuserId();
   }
   
   public void setAppuser(Appuser appuser) {
       this.appuser = appuser;
   }
   
   public List<Course> getCourses() {
       return courses;
   }
   
   public void setCourses(List<Course> courses) {
       this.courses = courses;
   }
   
        }
   

   иэто успешно, идентификатор appuser и учителя автоматически генерирует.

, но когда я использую http://localhost:8080/api/teachers и использую тот же формат JSON, он возвращает

cause": {
        "cause": {
            "cause": {
                "cause": null,
                "message": "ORA-01400: cannot insert NULL into (\"COURSE_MGMT\".\"TEACHER\".\"APPUSER_ID\")\n"
            },
            "message": "ORA-01400: cannot insert NULL into (\"COURSE_MGMT\".\"TEACHER\".\"APPUSER_ID\")\n"
        },
        "message": "could not execute statement"
    },
    "message": "could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement"
}

какя могу вставить в несколько таблиц? если я удалю нулевое ограничение, оно будет успешным, но данные не будут вставлены в appuser, только в учителя.