Look up VOZ1615 on FlightAware.
Wasn't it VOZ1384 that diverted?
If you look up VOZ1615, which is a scheduled MQL - MEL run, you'll see that today it was serviced by a 738 and operated 3 hours late. I'm not quite sure the connection to VOZ1384, since VOZ1384 is also shown departing MQL and finishing its trip to ADL after the diversion. But at any rate that seems to imply that VOZ 738s operating to MQL is not unheard of, which maybe was the point.
(P.S. As long as we're using IATA codes, let's be consistent about them.)