Good Evening, kind of following on the previous question but when it comes to characters who are the same character but an alternate reality/timeline version of a character who already exists, and all of that is canon and the driving plot of the series; does that still fall in the no duplicates rule?

Specifically for Sylvie (Loki) and OG!timeline Loki.

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Adding to that, with the Canon-must-be-1-month-old is that from when it first aired or the last episode?