City Navigator Update Will I HAVE To Update My City Navigator NT Software For My Garmin I3?

Will I HAVE to update my City Navigator NT software for my Garmin i3? - city navigator update

I have a Garmin i3 running City Navigator V.8. An update is to be available for € 75 with City Navigator 2008th There is no reason why he did not continue v.8 run for the life of the I3?