A. Try opening Book [TAB], then (while it's showing "BarIdea" quest details) press Enter or Left Mouse button click. Go to the place it shows. If it's at a bucket, then get that bucket, if it's at the Milking parlor then get any bucket and equip it (while carrying it, interact [Left Mouse Button] with the milking parlor , Nishy will place it under the milking parlor). Then get further away and check the Book. If it still says the same then it's probably a bug.
B. If the above didn't work, send me the a bug report (check at the end of game's description above on how to create a bug report). If i manage to fix it, i'll send you back a working save file.
It is highly recommended to start over since a lot of things where added, and might've not acquired all of the skills and unlocks (could result in a block later on again).
If the previous version you mentioned wasn't a final build (if it's vXXXXX some number, a development build) then i highly recommend restarting fresh to not get any surprises along the way.
I hope this helps,
Cheers