这个问题是为何呢，打开首页就出现这个错误提示

Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 511, in __call__
handler.get(*groups)
File "/base/data/home/apps/newsuzhouke/1.345115857577685916/main.py", line 67, in get
member = CheckAuth(self)
File "/base/data/home/apps/newsuzhouke/1.345115857577685916/v2ex/babel/security/__init__.py", line 14, in CheckAuth
cookies = Cookies(handler, max_age = 86400 * 365, path = '/')
File "/base/data/home/apps/newsuzhouke/1.345115857577685916/v2ex/babel/ext/cookies.py", line 6, in __init__
self._in = handler.request.cookies
File "/base/python_runtime/python_lib/versions/1/webob/__init__.py", line 985, in cookies
vars = self.str_cookies
File "/base/python_runtime/python_lib/versions/1/webob/__init__.py", line 973, in str_cookies
cookies.load(source)
File "/base/python_runtime/python_dist/lib/python2.5/Cookie.py", line 619, in load
self.__ParseString(rawdata)
File "/base/python_runtime/python_dist/lib/python2.5/Cookie.py", line 650, in __ParseString
self.__set(K, rval, cval)
File "/base/python_runtime/python_dist/lib/python2.5/Cookie.py", line 572, in __set
M.set(key, real_value, coded_value)
File "/base/python_runtime/python_dist/lib/python2.5/Cookie.py", line 451, in set
raise CookieError("Illegal key value: %s" % key)
CookieError: Illegal key value: wpgb_visit_last_php-http://www_suzhouke_com