Intento conectar Django a Azure SQL y aparece el error KeyError: diferible cuando empiezo a migrar el comando. No puedo encontrar una solución para este problema.

Yo uso esta aplicación:

 asgiref==3.2.10 Django==3.1 django-mssql-backend==2.8.1 pyodbc==4.0.30 pytz==2020.1 sqlparse==0.3.1

y esta es mi configuración en settings.py:

 DATABASES = { 'default': { 'ENGINE': 'sql_server.pyodbc', 'NAME': 'DBNAME', 'USER': 'DBUSER', 'PASSWORD': 'PASSWORD', 'HOST': 'databasename.database.windows.net', 'PORT': '1433', 'OPTIONS': { 'driver': 'ODBC Driver 17 for SQL Server', }, }, }

El error es cuando trato de ejecutar 'manage.py migrate'. Todo funciona bien hasta el octavo paso. Aquí está la salida:

 (venv) C:\Users\...\...\>python manage.py migrate Operations to perform: Apply all migrations: admin, auth, contenttypes, sessions Running migrations: Applying contenttypes.0001_initial... OK Applying auth.0001_initial... OK Applying admin.0001_initial... OK Applying admin.0002_logentry_remove_auto_add... OK Applying admin.0003_logentry_add_action_flag_choices... OK Applying contenttypes.0002_remove_content_type_name... OK Applying auth.0002_alter_permission_name_max_length... OK Applying auth.0003_alter_user_email_max_length... OK Applying auth.0004_alter_user_username_opts... OK Applying auth.0005_alter_user_last_login_null... OK Applying auth.0006_require_contenttypes_0002... OK Applying auth.0007_alter_validators_add_error_messages... OK Applying auth.0008_alter_user_username_max_length...Traceback (most recent call last): File "manage.py", line 22, in <module> main() File "manage.py", line 18, in main execute_from_command_line(sys.argv) File "C:\Users\...\...\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line utility.execute() File "C:\Users\...\...\lib\site-packages\django\core\management\__init__.py", line 395, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "C:\Users\...\...\lib\site-packages\django\core\management\base.py", line 330, in run_from_argv self.execute(*args, **cmd_options) File "C:\Users\...\...\lib\site-packages\django\core\management\base.py", line 371, in execute output = self.handle(*args, **options) File "C:\Users\...\...\lib\site-packages\django\core\management\base.py", line 85, in wrapped res = handle_func(*args, **kwargs) File "C:\Users\...\...\lib\site-packages\django\core\management\commands\migrate.py", line 243, in handle post_migrate_state = executor.migrate( File "C:\Users\...\...\lib\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 "C:\Users\...\...\lib\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 "C:\Users\...\...\lib\site-packages\django\db\migrations\executor.py", line 227, in apply_migration state = migration.apply(state, schema_editor) File "C:\Users\...\...\lib\site-packages\django\db\migrations\migration.py", line 124, in apply operation.database_forwards(self.app_label, schema_editor, old_state, project_state) File "C:\Users\...\...\lib\site-packages\django\db\migrations\operations\fields.py", line 236, in database_forwards schema_editor.alter_field(from_model, from_field, to_field) File "C:\Users\...\...\lib\site-packages\django\db\backends\base\schema.py", line 571, in alter_field self._alter_field(model, old_field, new_field, old_type, new_type, File "C:\Users\...\...\lib\site-packages\sql_server\pyodbc\schema.py", line 479, in _alter_field self.execute(self._create_unique_sql(model, columns=[old_field.column])) File "C:\Users\...\...\lib\site-packages\sql_server\pyodbc\schema.py", line 861, in execute sql = str(sql) File "C:\Users\...\...\lib\site-packages\django\db\backends\ddl_references.py", line 200, in __str__ return self.template % self.parts KeyError: 'deferrable' (venv) C:\Users\...\...>

pero si me conecto a la base de datos, veo una tabla creada desde Django.

por favor ayuda Gracias!