Hm, I don't know. My gut instinct says no, as I feel an unsaid part of this project is that since it was Ash's last time as the protag let's see if the writers & animators try to have every single Pokemon shown during his world tour/region revisits. Now that we're moving onto new protags, I feel it's unfair to their adventure to start off with a sheet that's filled out. They should start with a fresh sheet, like everyone who starts a Pokemon game with a blank Pokedex.
That said, what I feel is sometimes not what the showrunners think. If they're thinking this new series is an extension of the previous in terms of Pokemon shown, than that would be reason to keep the current filled out sheet.
In the end it's up to you. I say scrap it, but if there's proof the showrunners intended the previous shown Pokemon to be accounted for may want to keep filling it till the end. And of course there's always the "more work" option of doing both: keeping the filled out sheet but also starting a new one.