I recommend you to subscribe to my better barn: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=812179113
If this is not the right asset for you, I'll advise to extract this one with modtools yourself to get rid of the private tractor.

I have done that, and it is indeed an older version that has been placed down. Strangely enough, when I replace the tractor in asset editor, it still lists the old private one as required.

There is an asset bug, it seems to require an asset named "SmallTractor.Small Tractor [prop]_Data" which has not been added to my game, even after subscribing to "Small Tractor [prop]". The tool I'm using to diagnose this suggests that you may have placed the original private prop instead of the one you published. Could you fix this?

Looking really good. Does remind me of our countryside ;)