In Django Admin.StackedInline is not working in OneToOneField?

[puneetm...@gmail.com]

Below is my Base class 

class User(AbstractUser):

class Meta:

verbose_name =_("Student")

verbose_name_plural = _("Students")

ROLE = (

('STUDENT', 'Student'),

('TEACHER', 'Teacher'),

('STUDENT-TEACHER', 'Student-Teacher')

)

username = models.CharField(verbose_name=_('Username'), max_length=100, unique=True)

email = models.EmailField(verbose_name=_('Email'),max_length=200,blank=False,null=False)

dob = models.DateField(verbose_name=_("Date of Birth"), blank=False, null=True)

phone_number = models.CharField(verbose_name=_("Phone Number"), blank=True, null=True, max_length = 13)

role = models.CharField(max_length=50, choices=ROLE, blank=False, null=True)

is_active = models.BooleanField(default=False)

is_staff = models.BooleanField(default=False)

is_superuser = models.BooleanField(default=False)

created_at = models.DateTimeField(auto_now_add=True)

updated_at = models.DateTimeField(auto_now=True)

USERNAME_FIELD = 'username'

and here Below is My Another Model class(Teacher)

class Teacher(models.Model):

class Meta:

verbose_name =_("Teacher")

verbose_name_plural = _("Teachers")

TIMEZONES = tuple(zip(pytz.all_timezones, pytz.all_timezones))

GENDER_CHOICES = (

('MALE', 'Male'),

('FEMALE', 'Female')

)

LEVEL_CHOICES = (

('BEGINNER', 'Beginner'),

('INTERMEDIATE', 'Intermediate'),

('ADVANCED', 'Advanced')

)

pke = models.BigIntegerField(primary_key=True)

user = models.ForeignKey(User, blank=False, null=False, on_delete=models.CASCADE)

profile_image = models.ImageField(verbose_name=_("Profile Image"), blank=True, null=True, upload_to="teacher_image", default="/dummy.png")

gender = models.CharField(verbose_name=_("Gender"), choices=GENDER_CHOICES, blank=True, null=True, max_length=100)

level = models.CharField(verbose_name=_("Level Taught"), choices=LEVEL_CHOICES, blank=True, null=True, max_length=100)

country = models.CharField(verbose_name=_("Country"), max_length=30, blank=True, null=True)

city = models.CharField(verbose_name=_("City"), max_length=50, blank=True, null=True)

experience = models.FloatField(verbose_name=("Total Experience"), blank=True, null=True)

in admin.py of Teachers 

class CertificateInline(admin.StackedInline):

    model = TeacherDocument

    extra = 1

    max_num = 5

class TeacherInline(admin.StackedInline):

model = User

verbose_name_plural = "Profile"

# extra = 0

class TeacherAdmin(admin.ModelAdmin):

list_display=('experience',)

inlines = [TeacherInline, CertificateInline]

form = TeacherAdminForm

This Teacher Inline is not working , Giveing me an Error :-

<class 'modules.teacher.admin.TeacherInline'>: (admin.E202) 'users.User' has no ForeignKey to 'teacher.Teacher'