New error when running python migrate

When running python migrate, with no changes to run makemigrations, the following error is displayed:

raise ImproperlyConfigured(“settings.DATABASES is improperly configured.”
django.core.exceptions.ImproperlyConfigured: settings.DATABASES is improperly configured. Please supply the ENGINE value. Check settings documentation for more details.

Here are the lines referring to ENGINE and other access data to my database:
‘default’: {
‘ENGINE’: ‘django.db.backends.postgresql_psycopg2’,
‘NAME’: ‘secret’,
‘USER’: ‘secret’,
‘PASSWORD’: ‘94429251975fe18a54644a17ad72303f1368f523cb129dbbfce18ce8ec75b339’,
‘HOST’: ‘’,
‘PORT’: ‘5432’,
‘dev’: {
‘ENGINE’: ‘django.db.backends.postgresql_psycopg2’,
‘NAME’: ‘web_validator’,
‘USER’: ‘secret’,
‘PASSWORD’: ‘secret’,
‘HOST’: ‘db’,
‘PORT’: ‘5432’,
DATABASES[‘default’] = DATABASES[‘dev’ if DEBUG else ‘default’]

The database backend django.db.backends.postgresql_psycopg2 was removed in 3.0. Try using django.db.backends.postgresql

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The problem is that in the “” file I put the lines “from django.conf import settings” and “settings.configure()”, thus creating a blank configuration.