Because DRM Altair had proposed the same diversion of 12245/46, 22863/64 through VSKP earlier but ECOR rejected that given that it had no commercial halts. They also said that 22863/64 can not be routed through VSKP because it runs on the Duronto TT where as it has halts at KUR & BAM. There is a lot fiasco concerning this, so the diversion not happening anytime soon unless they introduce a new Duronto.