如何修复MySQLdb_异常。编程错误：wagtailcore_站点不存在？

Question

目前我正在部署我的网站到pythonanywhere一切都很完美，排除了我网站的front-side。

我得到了Internal server error作为前端站点，然后我查看了日志文件，我注意到了这一点

MySQLdb._exceptions.ProgrammingError: (1146, "Table 'transonhoang$default.wagtailcore_site' doesn't exist")
**NO MATCH**
The above exception was the direct cause of the following exception:
**NO MATCH**
Traceback (most recent call last):
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/utils/deprecation.py", line 90, in __call__
    response = self.process_request(request)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/wagtail/core/middleware.py", line 13, in process_request
    request.site = Site.find_for_request(request)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/wagtail/core/models.py", line 120, in find_for_request
    return get_site_for_hostname(hostname, port)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/wagtail/core/sites.py", line 35, in get_site_for_hostname
    'root_page'
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/models/query.py", line 268, in __iter__
    self._fetch_all()
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/models/query.py", line 1186, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/models/query.py", line 54, in __iter__
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1065, in execute_sql
    cursor.execute(sql, params)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/utils.py", line 68, in execute
    return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/utils.py", line 77, in _execute_with_wrappers
    return executor(sql, params, many, context)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
    return self.cursor.execute(sql, params)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
    return self.cursor.execute(sql, params)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 71, in execute
    return self.cursor.execute(query, args)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/MySQLdb/cursors.py", line 206, in execute
    res = self._query(query)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/MySQLdb/cursors.py", line 312, in _query
    db.query(q)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/MySQLdb/connections.py", line 224, in query
    _mysql.connection.query(self, query)
django.db.utils.ProgrammingError: (1146, "Table 'transonhoang$default.wagtailcore_site' doesn't exist")
2019-04-24 08:19:06,212: Internal Server Error: /
Traceback (most recent call last):
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/utils.py", line 85, in _execute
    return self.cursor.execute(sql, params)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 71, in execute
    return self.cursor.execute(query, args)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/MySQLdb/cursors.py", line 206, in execute
    res = self._query(query)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/MySQLdb/cursors.py", line 312, in _query
    db.query(q)
  File "/home/transonhoang/.virtualenvs/my-blog/lib/python3.6/site-packages/MySQLdb/connections.py", line 224, in query
    _mysql.connection.query(self, query)

MySQLdb._exceptions.ProgrammingError: (1146, "Table 'transonhoang$default.wagtailcore_site' doesn't exist")是什么意思？

我的步骤：https://github.com/texperience/wagtail-pythonanywhere-quickstart