on 7/7, K2SO released 1.6.21 which fixed a crash. Razi allows using this version (k2so version <= 1.6.21).
Unfortunately, this latest version of K2SO depends on Krastorio 2 Assets >= 2.0.5
Meanwhile, Razi requires Krastorio2Assets <= 2.0.3
Therefor, if one updates to K2SO 1.6.21, they'll now have a mangled mod config with an unsatisfiable constraint set that can only be fixed by downgrading K2SO the hard way.

Considering that the K2SO update in question "Fixed crash when playing with K2 assets v2.0.5", it should presumably be ok to just remove the 2.0.5 restriction from razi protocol. Alternatively, cap the k2so version at 1.6.20.