OP is correct that you can’t change the linked game now, but you can edit ad details and change the title of the ad.
It is interesting on the sterns that prems and LE’s share a category. So the median price is messed up for both. Sure i go in and check archives but most people don’t disclose actual sales price. All you then have is what the list price was - also misleading. I appreciate the fact that all categories for the CGC games are represented.