When Zaza was looking at the itinerary for the Literature Express, he noticed that Kaliningrad and Moscow were stops; he "immediately bade farewell" to Moscow since Georgians were denied visas to go to Russia. This makes sense given that relations between Georgia and Russia were severed following the latter's vicious and unprovoked attack on the former in 2008.
However, Kaliningrad (which was one stop before Moscow) is also in Russia; why did the narrator only comment on Moscow? Presumably if he couldn't go to Moscow he couldn't go to Kaliningrad for the same reason.