Hmmm... I thought it was solidly accepted that the vikings where here before 1492?
I think the idea that Vikings got to North America (Canada) first has been accepted for a long time. At least as long as I’ve been around. (Disclaimer - all my grandparents were born in Norway!).
The idea that they made it all the way inland to Minnesota has been in question. Although I guess the idea that the farmer faked it seems to be ruled out now.