Mutually exclusive Mayhem Modifiers?

I have tried around 1000 rolls and have never seen Drone Ranger come up at the same time as Buddy System. Are these modifiers intended to be mutually exclusive or am I really just that unlucky?

I believe those might be unable to roll together for technical reasons.
The only ones I know of that are intentionally mutually exclusive are chain gang and mob mentality because they kept on crashing the game when rolled together.

Yeah apparently they can’t roll together… (which is too bad because those are both modifiers I can live with heh)