Is Planet 9 really needed?

A new dwarf planet discovery might destroy the possibility of Planet 9's
existence. Ironically, this new planet was discovered while searching
for Planet 9. It doesn't fit into the model of planets that have been
discovered until now, which seemed to align up in a certain way. The new
planet doesn't fit the existing model, and in fact if this planet has to
exist, then Planet 9 can't exist, because P9 would've thrown this planet
out of the Solar System in this position.

http://www.dailymail.co.uk/sciencete...n-t-exist.html

In fact this Youtube video, attempts to model this new planet and how it
would be affected by Planet 9.

https://youtu.be/0qA5cJDRdm4

Yousuf Khan