TypeError: expected string or bytes-like object

from django.db import models

class User(models.Model):
"""
On fait hériter notre classe User de AbstractUser pour avoir les groupes, les permissions, le nom, l'email, etc.
Si vous n'avez pas besoin de ces fonctionnalités vous pouvez hériter de BaseAbstractUser
"""
username = models.CharField(max_length=255, unique=True, verbose_name=("Nom d'utilisateur"))
first_name = models.CharField(max_length=50, verbose_name=("Nom de Famille"))
last_name = models.CharField(max_length=50, verbose_name=("Prénom"))
birth_date = models.DateField(verbose_name= ("Date de Naissance"))
birth_place = models.DateField(verbose_name= ("Lieu de Naissance"))
email = models.EmailField(unique=True, verbose_name=("Adresse Email"))
adress = models.CharField(max_length=80, help_text='Exemple: 01 RUE DE CRAIOVA', verbose_name=("Adresse"))
adress_complement = models.CharField(max_length=80, help_text='Residence, batiment, Appt, BP, Chez..', verbose_name=("Complément d'Adresse"))
city = models.CharField(max_length=80, help_text='Exemple: PARIS', verbose_name=("Ville"))
zipcode = models.IntegerField(help_text='75016', verbose_name=("Code Postal"))
drive_licence_num = models.CharField(max_length=80, verbose_name=("N° du Permis de conduire"))
social_secu_num = models.IntegerField(verbose_name=('N° de Sécurité Sociale'))
phone_number = models.IntegerField(verbose_name=("Num de Tel"))


class Vehicule(models.Model):
matricule=models.CharField(max_length=10, verbose_name=("Plaque d'immatriculation"))
constructor = models.CharField(max_length=20, verbose_name=("Marque du véhicule"))
model_v = models.CharField(max_length=20, verbose_name=("Modele du vehicule"))
milling = models.IntegerField(verbose_name=("Kilometrage")) #need to be update
avaliability = models.BooleanField(default=True)

#class Booking(models.Modele)

Hello,

i have problem in migration, in my "model.py" file  i added a new table and new fields (into the exisiting table) and thats what i got when i do ""..manage.py migrate..."" :

Operations to perform:

  Apply all migrations: utilisateur

Running migrations:

  Applying utilisateur.0002_auto_20170518_1610...Traceback (most recent call last):

  File "manage.py", line 22, in <module>

    execute_from_command_line(sys.argv)

  File "C:\Python36\lib\site-packages\django\core\management\__init__.py", line 363, in execute_from_command_line

    utility.execute()

  File "C:\Python36\lib\site-packages\django\core\management\__init__.py", line 355, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "C:\Python36\lib\site-packages\django\core\management\base.py", line 283, in run_from_argv

    self.execute(*args, **cmd_options)

  File "C:\Python36\lib\site-packages\django\core\management\base.py", line 330, in execute

    output = self.handle(*args, **options)

  File "C:\Python36\lib\site-packages\django\core\management\commands\migrate.py", line 204, in handle

    fake_initial=fake_initial,

  File "C:\Python36\lib\site-packages\django\db\migrations\executor.py", line 115, in migrate

    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)

  File "C:\Python36\lib\site-packages\django\db\migrations\executor.py", line 145, in _migrate_all_forwards

    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)

  File "C:\Python36\lib\site-packages\django\db\migrations\executor.py", line 244, in apply_migration

    state = migration.apply(state, schema_editor)

  File "C:\Python36\lib\site-packages\django\db\migrations\migration.py", line 129, in apply

    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)

  File "C:\Python36\lib\site-packages\django\db\migrations\operations\fields.py", line 86, in database_forwards

    field,

  File "C:\Python36\lib\site-packages\django\db\backends\sqlite3\schema.py", line 238, in add_field

    self._remake_table(model, create_field=field)

  File "C:\Python36\lib\site-packages\django\db\backends\sqlite3\schema.py", line 113, in _remake_table

    self.effective_default(create_field)

  File "C:\Python36\lib\site-packages\django\db\backends\base\schema.py", line 228, in effective_default

    default = field.get_db_prep_save(default, self.connection)

  File "C:\Python36\lib\site-packages\django\db\models\fields\__init__.py", line 766, in get_db_prep_save

    prepared=False)

  File "C:\Python36\lib\site-packages\django\db\models\fields\__init__.py", line 1297, in get_db_prep_value

    value = self.get_prep_value(value)

  File "C:\Python36\lib\site-packages\django\db\models\fields\__init__.py", line 1292, in get_prep_value

    return self.to_python(value)

  File "C:\Python36\lib\site-packages\django\db\models\fields\__init__.py", line 1254, in to_python

    parsed = parse_date(value)

  File "C:\Python36\lib\site-packages\django\utils\dateparse.py", line 61, in parse_date

    match = date_re.match(value)

PS C:\Users\admin\vital>

i'v included the models.py file !!

so if someone can help !! 

thnx

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