In TOTJ, Ziost is the capital of the Sith Empire, implying that it's the homeworld of the Sith species. Furthermore, TOTJ references the Sith fleeing to Korriban to escape a genocide. However, KOTOR called Korriban "the homeworld of the Sith" and then a starwars.com article about the history of the Sith explained that the Sith species began on Korriban and moved to Ziost following a destructive conflict.

What I hate is that KOTOR said that Korriban is the Sith homeworld when that clearly wasn't the case and then the starwars.com article went with KOTOR's incorrect statement instead of declaring KOTOR an unreliable narrator.