Enabling Cheats makes Animal Crossing (GC) not load my save...

[Nokeo]

Hello! I went back to play Animal Crossing, but my town is full of weeds. So, I decided to use the AR code to get rid of them. I went to configue and enabled cheats. Right clicked on the game and chose to Weed be Gone.

Started up the game and it acts like my save file was never there. Just wants me to create a whole new town.
If I turn off enable cheats, I can play my old save. What is happening?

[JMC47]

I've seen this happen before with Super Mario Sunshine and 60 FPS cheats. I honestly don't know.