please don't you know by now that the slot number is a completely useless information ? You follow me and like all my posts for a year when I tell that to other users.
You could have Waninkoko rev9 base36 in slot249, how would I know you don't?
please, stop reporting the slot number as if it was what's important for the compatibility.
Always report the version of the patch (waninkoko/hermes/d2x ? v8/10/10-alt ? which base IOS?), that IOS could be in any IOS slot, I don't care where you put it! if you want to play just dance 2019 with an IOS in slot 232, I really don't care.
just dance REQUIRES base57 !
if your slot249 contains base56, this is where your problem is!
boo:
When you said the game has an update, do you mean a DLC update?
I only know ONE game had a DLC update to fix a bug : Zelda Skyward Sword.
if you talk about the disc update when trying to launch it from the Disc channel, this is NOT an update but an antipiracy attempt from nintendo.
By logic, There's no way to update to 2019 from 2018's ISO. these are two different games. there's no way Ubisoft would release a patch on eShop to update the game, as there's no more eshop access for a year!
But maybe I'm wrong? I don't know all.