La verificación de la contraseña de usuario falla después de guardar

Django 1.11 postgres (postgis)

hashes de contraseña definidos en settings.py

 PASSWORD_HASHERS = [ 'django.contrib.auth.hashers.PBKDF2PasswordHasher', 'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher', 'django.contrib.auth.hashers.Argon2PasswordHasher', 'django.contrib.auth.hashers.BCryptSHA256PasswordHasher', 'django.contrib.auth.hashers.BCryptPasswordHasher', ]

Lo que estoy tratando de hacer:

 > ./manage shell In [1]: from accounts.models import User In [2]: u = User.objects.get(pk=1) In [3]: u.password Out[3]: 'pbkdf2_sha256$36000$LlYFKXzibqZP$t7njfFLddkUos0ePjMTlSqM2KVhduFVvXTEobiHbXng= ' In [4]: u.check_password('123456') Out[4]: False In [5]: u.refresh_from_db() In [6]: u.set_password('123456') In [7]: u.password Out[7]: 'pbkdf2_sha256$36000$WwQpAA6KyVX8$2GMy23BV1go4h/f/nlBezA50Jsc7QOi2sBlZsYhPAYM=' In [8]: u.check_password('123456') Out[8]: True In [9]: u.refresh_from_db() In [10]: u.password Out[10]: 'pbkdf2_sha256$36000$LlYFKXzibqZP$t7njfFLddkUos0ePjMTlSqM2KVhduFVvXTEobiHbXng= ' In [11]: u.check_password('123456') Out[11]: False

Actualización: Primero lo pensé porque migre la base de datos de mysql a postgres pero incluso para restablecer la contraseña