error game update

hi guys, i have a problem: i installed a gran turismo update (1.05) in the same way as the quickstart guide says. Then when i tried to intall another update (2.0) the emulator gave me the message in the screenshot.
my question: am i dumb because i must install all the update sequentially or is there a problem in the emulator?

You can't skip updates, if there are updates between 1.05 and 2.00 you have to install all of them since they're cumulative.