I have the game FFX International (SLPS 25800) backup. I am using a Swap Magic with my PS2 Slim. The game worked fine until i reached Sin. Where players usually get stuck. I AM NOT USING AN EMULATOR. Anyway if I Buy the actual FFX International game ( legit real copy). Import it and load it up, will it bypass the error?

Yes i am willing to buy the game to bypass an error. That and its a great game i like it more than my NA version. SO purchasing it would not be a problem for me. BUt i dont want to buy a game i could never progress in.
I found a video on youtube somebody with the same exact problem as me but no solution was found in the comments.

http://www.youtube.com/watch?v=95BM0tiZHVI

Thanks.