Actually it was just the most practical solution for me when I set up mezzmo to let it get the year from the file properties because I could change almost all of the files in a few steps.
Since there aren't that much movies older than 1970 it's no real problem, particulalry if there will be a feature to update movie information by script.
I posted it because I thought maybe there is just a range in the program code that can be set different like 1970-*** -> 1960-*** , I have no programming skills by the way .
Anyway, if it's not a big deal it would be cool if you could disable the error alert.