>>2669This is about ~400 years before most estimates of the flood
The book of Genesis is very clear the flood happened 1656 years after creation.
Either the biblical timelines aligned to the Gregorian calendar are off here, or the tree lived through the flood (unlikely, it covered all mountain tops at one point, although perhaps it was brief at higher elevations and the water wasn't as destructive).
Or simply the tree's dating is just wrong, there seems to be some controversy over this according to Wikipedia.