Junxia Wang's monster 8:06.11/3000 (September 1993, Beijing) has never been nullified. In that race, btw, second place "no name" Chinese female, Yunxia Qu, ran 8:12.18, and not far behind her teammate Linli Zhang 8:16.50. Other zhonguo lady, Liyan Ma, 8:19.78. Those times, from 1993 (!), would still be top notch today, ahead of Klosterhalfen, Gidey, Obiri and other monster women.
My point: Chepngetich's 2:09:56 will probably remain in the record books for eternity. It might take years, or decades to beat that time. Difficult/impossible to predict.