makemigrations 未运行且未在 Django DB 中创建表

在 Visual Studio 2017 中进行开发。在执行“makemigrations”以及检查“manage.py check”时，我有相同的系统响应：

运行：manage.py makemigrations

Traceback (most recent call last):
File "...\DjangoWeb\env\lib\site-packages\django\db\backends\utils.py", line 64, in execute
    return self.cursor.execute(sql, params)

File "...\DjangoWeb\env\lib\site-packages\django\db\backends\sqlite3\base.py", line 328, in execute

return Database.Cursor.execute(self, query, params)
sqlite3.OperationalError: no such table: app_entry

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "...\DjangoWeb\manage.py", line 17, in <module>

execute_from_command_line(sys.argv)

File "...\DjangoWeb\env\lib\site-packages\django\core\management\__init__.py", line 364, in execute_from_command_line
    utility.execute()

File "...\DjangoWeb\env\lib\site-packages\django\core\management\__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)

File "...\DjangoWeb\env\lib\site-packages\django\core\management\base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)

File "...\DjangoWeb\env\lib\site-packages\django\core\management\base.py", line 327, in execute
    self.check()

File "...\DjangoWeb\env\lib\site-packages\django\core\management\base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,

File "...\DjangoWeb\env\lib\site-packages\django\core\management\base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)

File "...\DjangoWeb\env\lib\site-packages\django\core\checks\registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)

File "...\DjangoWeb\env\lib\site-packages\django\core\checks\urls.py", line 16, in check_url_config
    return check_resolver(resolver)

File "...\DjangoWeb\env\lib\site-packages\django\core\checks\urls.py", line 26, in check_resolver
    return check_method()

File "...\DjangoWeb\env\lib\site-packages\django\urls\resolvers.py", line 256, in check
    for pattern in self.url_patterns:

File "...\DjangoWeb\env\lib\site-packages\django\utils\functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)

File "...\DjangoWeb\env\lib\site-packages\django\urls\resolvers.py", line 407, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)

File "...\DjangoWeb\env\lib\site-packages\django\utils\functional.py", line 35, in __get__
    res = instance.__dict__[self.name] = self.func(instance)

File "...\DjangoWeb\env\lib\site-packages\django\urls\resolvers.py", line 400, in urlconf_module
    return import_module(self.urlconf_name)

File "...\Microsoft Visual Studio\Shared\Python36_64\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)

File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File ".\DjangoWeb\urls.py", line 8, in <module>
    import app.views

File ".\app\views.py", line 68, in <module>
    ENTRY_COUNT = Entry.objects.count() # кол-во зявок в БД

File "...\DjangoWeb\env\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)

File "...\DjangoWeb\env\lib\site-packages\django\db\models\query.py", line 364, in count
    return self.query.get_count(using=self.db)

File "...\DjangoWeb\env\lib\site-packages\django\db\models\sql\query.py", line 499, in get_count
    number = obj.get_aggregation(using, ['__count'])['__count']

File "...\DjangoWeb\env\lib\site-packages\django\db\models\sql\query.py", line 480, in get_aggregation
    result = compiler.execute_sql(SINGLE)

File "...\DjangoWeb\env\lib\site-packages\django\db\models\sql\compiler.py", line 899, in execute_sql
    raise original_exception

File "...\DjangoWeb\env\lib\site-packages\django\db\models\sql\compiler.py", line 889, in execute_sql
    cursor.execute(sql, params)

File "...\DjangoWeb\env\lib\site-packages\django\db\backends\utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)

File "...\DjangoWeb\env\lib\site-packages\django\db\backends\utils.py", line 64, in execute
    return self.cursor.execute(sql, params)

File "...\DjangoWeb\env\lib\site-packages\django\db\utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)

File ...\DjangoWeb\env\lib\site-packages\django\utils\six.py", line 685, in reraise
    raise value.with_traceback(tb)

File "...\DjangoWeb\env\lib\site-packages\django\db\backends\utils.py", line 64, in execute
    return self.cursor.execute(sql, params)

File "...\DjangoWeb\env\lib\site-packages\django\db\backends\sqlite3\base.py", line 328, in execute
    return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: app_entry

同时，“migration”项目文件夹中的所有migration文件都被删除，除了“--init--.py”文件，数据库文件本身被系统删除并重新创建，但不断给出上述错误..

这里可能有什么问题以及如何解决？