What order is prev items?

Task 1: Next Product Recommendation
#1

Thank you for holding this competition.

What order is a column of “prev_items”?
a lower index is newer? or older?

#2

Will it make any difference?
Are you planning to give more weightage to later ones or so?

#3

I have the same question!
I want to truncate the session data. But don’t know the order

#4

I have the same question!