BP is "before present". (a quick edit: for "BP" time, year 0 is 1950, so 200BP would be 1750.)
The earliest Clovis points date to about 13,000 years ago. Having sites in North America 10,000 years before Clovis nullifies the whole "Clovis first" paradigm. Along with that idea was populating North America through an ice free corridor in the Cordilleran ice sheet. There was no ice free corridor 23,000 years ago. This more or less forces the populating of N.A. to have been by boat along the coast following the "kelp highway" rather than overland. Most of the artifacts from that route are under hundreds of feet of seawater today since the melting of the continental glaciers has pushed sea levels up that much.
There were at least 4 periods in the pleistocene where there was a Bering land bridge rather than open water but we don't have any generally accepted evidence of human occupation going back to those earlier 3 periods. For now, the suggested, speculative very early "stuff" (100K years BP) seems to stand alone with no supporting evidence and most likely is wishful thinking, not evidence of human occupation. Possibility of 30K years could be inferred though.
The important part is that Clovis technology was NOT the earliest in North America, people were here before Clovis technology was developed. Most likely, also, since there were already people here, Clovis, despite having strong similarity to Solutrean technology, is probably a North American development. With people already here, there should be strong genetic connection if the technology were imported.