In other words,
The old save file that was supposed to be deleted was retained in another form due to this bug and merged into the new save file.
"But there's a prerequisite for this, which is that the new save and the old save must have the same beginning, with the same protagonist Abab."
This also explains why no one else could trigger this bug, but Guo Mo managed to do so successfully.
He happened to start with the "paralyzed legs" scenario twice, which perfectly met the preconditions for triggering the bug. Without this precondition, the old save would be normally deleted and couldn't be retained.
"In our game, different beginnings mean the protagonist's code is different."
Chen Ba pondered, "Blind Abab is one line of code, and wheelchair Abab is another. Only the same beginning can trigger it?"
"Exactly!"
