Card creation/edit: JS sends "undefined" values instead of nothing
https://sentry.io/vindarel/abelujo/issues/319633879/
Error parsing the publication date of card carnet à pois: Input type must be str or unicode
https://sentry.io/vindarel/abelujo/issues/319633879/
Error parsing the publication date of card carnet à pois: Input type must be str or unicode