4% Haplogroup K and 7% Haplogroup N in Cologne?

[Karakhitai]

https://www.researchgate.net/profile/Ruediger_Lessig/publication/40852497/figure/fig1/AS:27754616486088@1443183570471/Haplogroup-distribution-in-regional-populations-from-Poland-eight-regions-and-Germany.png

Can someone explain?

Could it be from the Prussians?