Memcached – 'Client' object has no attribute '_deletetouch' in django admin logout section

I am unable to logout the user in admin panel of Django. The logout task is not perform after using memcached code in Django settings file. It shows an error like:

‘AttributeError at /admin/logout/’

and

‘Client’ object has no attribute ‘_deletetouch’.

The memcached code in settings.py as:

enter code here
SESSION_ENGINE='django.contrib.sessions.backends.cache'
CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '127.0.0.1:11211',
    }
}