[charlie_ps2]

Argo's asleep (or playing on his Messiah chipped PS2). So here's your answer.

You have a pplied a patch that addresses a different version of the game and this is detected by the patcher from info stored in the patch when the patch was made.

The game is unlikely to work in the way intended. It depends on the type of patch as to when you'll notice it but in mot cases it'll be at boot time.