Django Python - Can`t install fixtures in test database

Question

HiEveryone

Got some problem why trying to load fixtures in Django test database.

1. I made fixture of DB by exec command

python manage.py dumpdata misxapp --format=yaml --indent=4 >  misxapp/fixtures/misxapp.yaml

2. In misxapp.tests.py I use StaticLiveServerTestCase class property "fixtures"

fixtures = ['misxapp']

3. Then I run test

python manage.py test misxapp.tests.TestAuthorization.test_login

and get exception

psycopg2.errors.UndefinedColumn: ERROR:  column "date" in table "misxapp_insurancepolicy" doesn't exist.
LINE 1: ..., "organization_id_id" = 34, "person_id_id" = 23, "date" = '...

!!! BUT !!!

column "date" exists both in models.py file and Postgresql database(table misxapp_insurancepolicy)

I assume that the problem is in the naming of the date field in Postgresql, but not sure at all. please tell me in which direction to dig, thanks!!!