model change+migration (add id_key to comment): run ./bin/django migrate
{%extends"site/layout/base.html"%}{%loadi18n%}{%blockcontent%}<h1>404: {%blocktrans%}Page not found{%endblocktrans%}</h1>{%blocktrans%}The requested page could not be found.{%endblocktrans%}{%endblock%}