So, yeah, you can poo-poo the idea of retconning in a story where, basically, everyone who’s posted in this thread is the entirety of who you’d be worried about knowing anything about it.
I would argue: don’t be so dismissive.
Our attention to world-building detail, or ability to maintain some kind of an (admittedly occasionally foggy) institutional memory and a recounting of the history of our characters and story universe is one of the central pillars that makes Kupopolis what it is. These details matter, and putting them into some kind of order matters, because they enrich our story and make it more meaningful.
Point being: these things need to be carefully considered. Retcons that benefit the story universe as a whole, and which treat our history with some reverence, should be executed in the most thoughtful and careful manner. Otherwise what’s the point? Just launch an entirely new story and dispense with the pretense of calling it “Kupopolis.”
((no, don’t actually do that, that was rhetorical))