Two climate activists from the Last Generation movement flung mashed potatoes on a valuable painting by French impressionist Claude Monet at a museum in the German city of Potsdam, just outside Berlin, on Sunday. Whether the painting from Monet’s “Les Meules” (Haystacks) series had sustained permanent damage still had to be investigated, said Carolin Stranz, a spokesperson for Museum Barberini. She said the potatoes were quickly removed and the painting was protected by a glass pane. The two activists wearing high visibility orange vests also glued themselves to the floor, with a total of four…