Sorry, disproven? As far as I am aware(layman), the claims have only been disproven by evidence pushing it further back.
One of the chief problems I am aware of is that the places they inhabited and the coastal path they likely took is now under a considerable amount of ocean.
Well the clovis people were likely a significant factor in the extinction of most of North America’s megafauna and only arrived relatively shortly before the end of the ice age.
What we are talking about is that they’re is mounting evidence of significantly older human activity(instead of 10-16k, we’re talking 40-100k)