In one of the (terrible) later season Futurama episodes, someone travels back in time from the even-more-distant future to stop a robot uprising. They succeed in doing so, only to then be wiped from existence because, if they stopped the robot uprising, they future they came from wouldn’t exist, so they wouldn’t be able to travel back in time to stop it in the first place, creating a paradox that erases them from existence.
The thing is, it’s explicitly shown that they travelled back in time using the machine language time code. And the whole point of the machine language time code, as established in a previous season, is that it negates paradoxes.