When doing the Missing Machinery mission, you are able to remove cargo, and if you are close to the Drilling Spare Parts, you can also remove them (when they are still on the ground).

First, I think this is a bug to be able to remove the mission cargo.

Second, you are not able to restart the mission to make them appear again.

The counter still says 0/4 parts collected, but after I removed one of the parts (from the game), there is only 3 parts able to pick up in the world.