Hello there @mktxsis,
So sorry for the delay in response!
There is currently no sort of "Undo" function for this type of accidental bulk action. At this time, you would need to un-check that "non-machineable" selection manually.
I know this may not be the direct action you were hoping for, and in that spirit, I invite you to make a post in our Ideas Board to advocate and gather interest for this type of feature addition to be considered in the future.