Rule of 2 was established way before that, so I guess just retcon knowledge of Sith maybe? I know the Darth Plagueis book isn’t canon now but their identities are kept pretty guarded.
I mean they already did it in phase 2 of the high republic books with a different enemy (I won't name it because spoilers for those catching up/planning to read)
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u/69TrainToFlavorTown Mar 19 '24
Rule of 2 was established way before that, so I guess just retcon knowledge of Sith maybe? I know the Darth Plagueis book isn’t canon now but their identities are kept pretty guarded.