I will update the polygon data for Finland today. The only difference is that
Pertunmaa has been removed. It's now a part of
Mäntyharju.
Reference:
https://en.wikipedia.org/wiki/Pertunmaa
I found this tag that mentions Pertunmaa.
tagId:36283 creator:arisoft gccode:GC4D505 scriptEnabled:1 tagEnabled:1 country:Finland
But if I understand the challenge correctly it won't really be affected since it's a white-list of counties. It's just one less. But the merged one is included, so it's still the same area.