Just as a weird question if anyone has had this happen.

I have two saves which have used the any% glitches up to pazuzu. Recently I tried to save over those saves except it basicly hardlocks the game. I can enter these saves when I start the cart up but if I try to save over them it always hardlocks the game. I tried going further in the game on those two saves and then save over them without any results.

So is my only option just to open the cart and take out the battery for the saves to get erased at this point?