NGC6397, example of the evolution of merging Black Holes from small to more massive Galaxy Anchor Black Holes (A= GABH of the second class Q-FFF Theory/photos Hubble)
Not all massive Dark Matter Black Holes repel Fermions, only the supermassive central galaxy BHs does.
NGC 6397 is the star cluster, second closest to the sun.
Conclusion, NGC 6397 belongs to the Milky Way Galaxy system according to Quantum FFF Theory.
see also: mass loss of star clusters by escaping stars.