ok, here is a possible solution
1. save your game
2. go to https://www.saveeditonline.com
3. upload your saved file from your game root\game\saves
4. from there, search for ekwipunek > amounts > 33
5. click on its amount and change the value to 1
6. scroll way down, save the game (replace)
7. from the game, load the saved game and try it again