Django throwing UNIQUE Constraint failed even after adding unique = False-CodePudding

I am developing a custom usermodel for my application in django, by using AbstractUser. But I am getting a UNIQUE constraint failed error while using add user from django admin. I have also tried to add unique = False in the EmailField

class User(AbstractUser):
    id = models.BigAutoField(primary_key=True)
    rollno = models.CharField(null=True,unique=True,max_length=15)
    email = models.EmailField(blank=True,null=True,unique=False)

Error :

....
    return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: UNIQUE constraint failed: Accounts_user.email
[28/Jun/2022 05:54:58] "POST /admin/Accounts/user/add/ HTTP/1.1" 500 233697

The add form does not have a email field, submits a blank email.

(PS : I can add user by signup form of my application, change user of django admin is also working.)\

CodePudding user response：

in the above code, there should not be any problem with migrations. i think your old migrations are creating problem here. check your old migrations and delete them.