One RF from VSG tells me that the PM of VSG NZM clone Humsafar used to take place at VSG also there were even extra spare LHB coaches for that train kept at VSG. (His Instagram account even has those pics of clone on VSG pitline, some spare coaches and LHB coach in the coach care centre)
Someone other RF from MAO tells that it was taken to UBL CDO for PM and then brought back to VSG after PM done.
Total confusion here.