not the first time for DLI. Earlier during its ICF days, 2435 GHY-NDLS Rajdhani quite frequently used to reach NDLS via DLI.
I don't remember the time, maybe during 2007/8, there were some work going on at NDLS. So most of the trains were diverted to other stations like BCT Rajdhani to NZM, Sampoorna Kranti to DSJ and HWH Rajdhani to DLI.