Firstly, he was officially aged in the Phantom Menace Insider Guide to being 60 years old by the time of Episode 1, meaning he wouldn't even be born by the time of this show was set in, being 100 years before the events of the movies. Secondly, him knowing of the sith's return before that point makes no sense, since he says, as shown in this video, "the sith have been extinct for a millennia." A millennia is 1000 years.
@@nofacedgoldfish6216 his age wasn't confirmed in canon, only in legends, and the Acolyte technically doesn't break canon because Ki Adi Mundi here didn't know about the mysterious "sith", so therefore if he never meets the sith in the Acolyte, and doesn't know about it, it doesn't break canon to the TPM
