Hearts of Iron IV

Hearts of Iron IV

Rise of Nations
Polish-Russian war 1919
While i was playing the soviet union and fighting the polish i crushed the polish faction quite fast and I dont know but maybe becues of that it happened that somewhere around october 1920 a popup happened where the polish got the scripted peace deal where they get my land but they were already a puppet, could i pls get an answer to why this might have happened thank you