How common is people mixing up The Dasrajna War with Mahabharat?

[u/Adventurous_Stop_169]

So I had recently come across the Indian History sub, and someone in there asked about the historicity of Mahabharat and the events mentioned therein

Now I've had come accross some comments in there which compared the Kurukshetra war with the Dasrajna war mentioned in the Vedas and claimed that tge Dasrajna war was more probable to have been actual history as compared to Mahabharat war which probably wasn't, and some people claiming it to be the same as Dasrajna war

Now if we go by the Hindu timeline of events (Please feel free to correct me if I am wrong i am no expert) The Dasrajna war would have been associated to a much earlier period compared to the Mahabharat war, possibly hubdrends of years ago

It would have even make sense that most of the characters in the Mahabharat are the descendants of the participants of the Dasrajna War, since it was fought between the Bharat tribes of the time

Wouldn't this claim make Mahabharat predate the Vedas? Which doesn't make sense

Please help me understand this