Make a copy to default value when retrieve it.
Make a copy to default value when retrieve it.

moradology/django-pgjson,rodo/django-pgjson,mamigot/django-pgjson,uditagarwal/django-pgjson,djangonauts/django-pgjson,djangonauts/django-pgjson,uditagarwal/django-pgjson,moradology/django-pgjson,rodo/django-pgjson,mamigot/django-pgjson