Diddy kong racing NOT FOR RESALE - Unusual label - no text logo.

I just found this cartridge which has the Not for resale box, but there is no text in the little red box.
This would normally have the NOT FOR RESALE in it.
At first I thought the text had been scratched off or covered with liquid paper.
But after close inspection, it seems more like glue remnants.
The label seems undamaged and I rubbed it a little with my thumb and the glue almost seemed like it wanted to come off.
So it might look like there was once a sticker there. I am in french canada territory so maybe this cart had a french variant of the sticker?
Anyone has seen something like this before?
Comments
Im not game to try goo gone on it just to see if the mark would come off, it probably would not anyway.
It is not in the best of condition in any case. Sun fading and label nicks.
Some idiot probably thought he couldn't sell it back in the day if it had the warning on it.
Yes this is my guess at this point. Not sure what tool was used to erase it. Maybe en electric rotating eraser?
I have not actually tried it yet but I do not expect anything out of the ordinary.