Post view count numbers

Once we installed a new, the post view counters were reset to 0:disappointed: Also, after deleting the old theme, all previous counts are deleted from the DB.

Now the question is, how can we manually/in bulk set some random view count values for the posts? I think having seen a way to insert view count values with ACF, but they are not incremental, are they? you just set i.e. 1000 views and it's fixed (I'd think)

What other option would you suggest?