They were forced to change the name and some artworks after receiving a cease and desist by Sony over the BloodBorne Intellectual Properties.

In the USA, IP protects not only blatant name copies but also applies to any product that attempts to make consumers associate the two or confuse the two. So by constantly saying “ITS BLOODBORNE KART ITS THE KART GAME BASED ON BLOODBORNE! SONY’S IP BLOODBORNE PRODUCT, RIGHT HERE!” we’re actually making future lawsuits more likely.