If Russia and the West lift their visa sanctions.
This was stated by the Polish Ambassador to Ukraine Bartosz Cichocki.
So, the reason for the statement was the conflict between Belarus and Ukraine due to the unplanned landing of the Ryanair airline in Minsk.
Kiev stopped air traffic with Minsk and closed Ukrainian airspace for Belarusian aircraft. In this regard, the conduct of negotiations on the Donbass in the capital of Belarus came into question.
The Polish Ambassador to Ukraine said that if there is a desire to hold negotiations in Warsaw or Krakow, they will be logistically ready.
But the only condition for this is the mutual lifting of visa sanctions by Russia and the West.