Having created literal mayhem in an unstable orbit of uncounted masses, ie for a giant externality. Next flight up, don't be within a large amount of space nearby in orbital terms, without care. (Maybe. Im not a kerbal person or an astronomer or flight engineer. This is a precautionary question to risk and to whom it applies)

Asteroids are very far apart from each other on the whole. Kicking one off in a different direction with a rocket isn't so different from a change in direction from a (rare) collision, except that it will almost certainly only affect one asteroid. ~25% of all the mass in the asteroid belt is the dwarf planet Ceres, which is only 0.0128 the mass of our moon. https://en.wikipedia.org/wiki/Ceres_(dwarf_planet)

There’s a vast amount of rubble flying about any which way up there already. About 100 tons of rock and dust enter the earths atmosphere every day, it’s just that space is so vast the chances of any of it hitting a vehicle are quite small.