Debug data for this request are no more available.

Debug data are stored using the django cache framework.
You can configure how data are stored and how long they are available by
creating a 'debug-panel' cache entry into your CACHES setting.

For example :

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '127.0.0.1:11211',
    },

    # this cache backend will be used by django-debug-panel
    'debug-panel': {
        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
        'LOCATION': '/var/tmp/debug-panel-cache',
        'TIMEOUT': 300,
        'OPTIONS': {
            'MAX_ENTRIES': 200
        }
    }
}

If there is no 'debug-panel' cache entry, then the default cache will
be used. And finally if there is no default cache, a local memory
cache will be used.