I have the impression that scientists are forcefully dating erectus and denisovans as early humans. Why should they? Modern populations have the genes of these hominids. See for yourself in this article what it looks like: https://watchers.news/2017/08/13/new-dating-of-lida-ajer-cave-fossils-places-modern-humans-in-southeast-asia-73-000-years-ago/ The discovery of the presence of early modern humans on Sumatra about 73-63,000 years ago has great significance for human history and migration.