I think the database you provide to download not support IPv6 country list
Can you update or provide a file to upload to database locally, it would bee great
please not make the database splitt in BIG parts as default mysql is sett allow max 16 mb data to upload if you not change the mysql settings on your server. try splitt the upload in smaller parts like 14mb and more clicks to upload the database rather then change settings in msql server
Thanks
Ow-ghost