Mechanical disc rotor for CUBE MTB - front wheel : Shimano 559x17-21c
As you wrote, your bike already uses 160 mm Centerlock disc at front. If you need a new disc instead of worn/damaged old one, any 160 mm Centerlock disc will be compatible.

There are some concerns about certain brake pads types not being compatible with all disc types, but in my opinion it does not matter, all pads just work with metal discs.

Do not go with different diameter of discs unless you experience lack of stopping power. If so, bigger 180 mm discs may be an answer, but you'll need to check if they are compatible with your fork and won't break bicycle warranty. Besides, an extra/different adapter is usually needed to install a disc of a different size.