Migration fails for Django 3.2 to KeyError 'include'

[mikko-ahonen]

---> Migrating database ...
/usr/local/lib/python3.7/site-packages/environ/environ.py:630: UserWarning: /app/productregister/.env doesn't exist - if you're not configuring your environment separately, create one.
"environment separately, create one." % env_file)
Operations to perform:
Apply all migrations: accounts, admin, auth, contenttypes, product, reversion, sessions
Running migrations:
Applying contenttypes.0001_initial...Traceback (most recent call last):
File "./manage.py", line 22, in
main()
File "./manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.7/site-packages/django/core/management/init.py", line 419, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.7/site-packages/django/core/management/init.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 398, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.7/site-packages/django/core/management/base.py", line 89, in wrapped
res = handle_func(*args, **kwargs)
File "/usr/local/lib/python3.7/site-packages/django/core/management/commands/migrate.py", line 246, in handle
fake_initial=fake_initial,
File "/usr/local/lib/python3.7/site-packages/django/db/migrations/executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python3.7/site-packages/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python3.7/site-packages/django/db/migrations/executor.py", line 227, in apply_migration
state = migration.apply(state, schema_editor)
File "/usr/local/lib/python3.7/site-packages/django/db/migrations/migration.py", line 126, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/usr/local/lib/python3.7/site-packages/django/db/migrations/operations/models.py", line 531, in database_forwards
getattr(new_model._meta, self.option_name, set()),
File "/usr/local/lib/python3.7/site-packages/sql_server/pyodbc/schema.py", line 156, in alter_unique_together
self.execute(sql)
File "/usr/local/lib/python3.7/site-packages/sql_server/pyodbc/schema.py", line 861, in execute
sql = str(sql)
File "/usr/local/lib/python3.7/site-packages/django/db/backends/ddl_references.py", line 201, in str
return self.template % self.parts
KeyError: 'include'

[sanderkollerie]

I have the same problem. Any solutions?