The evidence most likely indicate that early humans found a dead lion and ate it. NO predator earns its living by killing other predators its own size or larger; you wouldn’t live long enough on average to reproduce.
I’d say this proves that , no matter what killed the lion, that our ancestors used knives or spearpoints to scrape the meat off the bones.
No reason to let anything go to waste when you have prehensile appendages and a sharp object.
I would add to that that it would take more than a single instance to lead me to believe that early humans armed only with spears or even longer range edged weapons routinely hunted big cats.
Such a find could much more likely indicate that the cat was killed by a family group in self defense and the cat was eaten as they would any kill. The meat was simply to valuable to go to waste.
In a time of great hunger a family group could be forced to hunt any animal to avoid starvation.
Hunting the big cat could have been a rite of passage or the rite of coronation to be tribal chief.
A dead lion fresh enough to eat and they scared off whatever killed the lion? There was no mention that the lion had arthritis and died from old age so maybe they killed it and ate it.
One guess is as good as another.
There’s not much reason to suspect that older male cave lions didn’t wind up maneaters, as happens with older African lions today — in which case there’d have been a strong incentive to get rid of it, and as long as it was dead, fire up the barby.
On FB, when I posted it today, I suggested that it’s probably worthwhile to look for chunks of dead guys in cave lion coprolytes.