How to correct the year

The only release date listed for this title is the original Norwegian release date, which is 11 Augusti 1969. So, why does it say "Olsen-Banden (1968/II)" in the title listing? I know the "/II" is to separate it from the Danish version, released in 1968, but this one should say "Olsen-Banden (1969)". How do I fix that, since the release date doesn't affect it and it's impossible to change the year by changing the title?