My django app is throwing this error on trying to use the createsuperuser command even after deleting the db file and syncing again:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/utils.py", line 89, in _execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/sqlite3/base.py", line 477, in execute
    return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such column: user_customuser.fullname
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/home/Henkan/main_store/manage.py", line 22, in <module>
    main()
  File "/home/Henkan/main_store/manage.py", line 18, in main
    execute_from_command_line(sys.argv)

models.py

from django.contrib.auth.models import AbstractUser
from django.db import models
from .managers import UserManager
from upload.models import Product
from django.conf import settings


class CustomUser(AbstractUser):

    previous_orders = models.ManyToManyField(Product,related_name = 'previous_orders')
    cart = models.ManyToManyField(Product,related_name = 'cart')
    address = models.TextField(default='Address not provided')
    fullname = models.CharField(max_length=20,default='Name')
    email = models.EmailField(unique=True)

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['fullname']
    objects=UserManager()

    def get_url(self):
        token = settings.F.encrypt(bytes(self.email,encoding='utf8'))
        return token

managers.py

from django.contrib.auth.base_user import BaseUserManager

class UserManager(BaseUserManager):
    def create_user(self, email, password = None, **extra_fields):
        if not email:
            raise ValueError('Email is required')

        extra_fields['email'] = self.normalize_email(email)
        user = self.model(**extra_fields)
        user.set_password(password)
        user.save(using=self.db)

    def create_superuser(self, email, password = None, **extra_fields):
        extra_fields.setdefault('is_staff',True)
        extra_fields.setdefault('is_superuser',True)
        extra_fields.setdefault('is_active',True)

        return self.create_user(email, password, **extra_fields)

The code was working before,but I was trying to switch to fullname instead of username which resluted in the above mentioned error.