Wonder what the geo-political consequences could be. What if Big Brother Putin now says all EU planes are banned from flying over Russia.

Or what if Russian ATC are ordered to route planes flying from the east to Belarussian airspace. Of course there's probably a bit of freedom to choose routes by pilots, but if I were Putin I'd just say (or tell my ATC to say): "those routes are closed because of military training, your only available route is here through Belarussia"