I've been following any and every update concerning Australian Aboriginality for a few decades now, OR, It intensified back in the mid eighties after being accepted at the University of New England to study archaeology and paleoanthropology. During my time there I realised that there was/is a hipster like attitude concerning early dating of Aborigines in this country.
It was well known that the stratigraphical delineation surrounding the finds at Lake Willandra had collapsed, due to the constant and consistent movement of the surrounding material of the sand hills where the remains are sited, and that the usual techniques for dating were considered haphazard and a large area of doubt must be expected due to contamination, and the senesence of C14 dating for that length of time.
There are other methods of dating which could give a more accurate date, but due to the remains being locked away from human gaze, and the need to consider certain cultural sensitivities, the remains have not had more than a searching glance since about 1992.
I suppose that what we can glean from the situation is that humanity lived there for some considerable time, the climate for that area, at the time, was more benign, they possibly lived alongside local megafauna, evidence indicates that they were Homo sapien with religious beliefs, specific burial traditions including cremation which would indicate a group culture of some sophistication and a lithic technology that was abundant. The physical evidence from the remains indicated osteoarthritic wear in the lumbar area, and significant wear on the teeth indicating a possible age of fifty years upon its death. Subsequent studies using the length of limb bones to estimate LM3's height, suggest a height of 196 centimetres -77 inches or 6 ft 5 inches.