[Make a CMS card's id unique] Reusing existing code, and keeping in mind that it's preferrable to destructure the object rather than mutate the id in place. #cms

cards-crud-inside-map-inside-buildCards.js

try {
  const card = buildCard(
    card,
    data,
    filtersAndFormatters,
    Object.assign({}, settingsAndOptions, { cardIndex })
  );
  return {...card, id: `${card.id}:${cardIndex}`};
}