It's very odd to see this mix-up, seeing things a lot different than what it was. Hmmm... makes you think, could this be related to Earthbound?
The full release of Deltarune will coincide with the American release of Mother 3/Earthbound 2
It's an AU. Something something Chara says something about "deleting this world and moving on to the next one" after a Genocide run in OG UT. This universe has a lot of differing elements from OG UT as well, like certain characters not knowing each other and Asriel being alive, etc...
I don't think anything from the genocide run should be considered canon since that's the 'everyone dies' path, AUs aside
Also, isn't Asriel technically alive in the true pacifist run's epilogue?