leCrispy

I just built this massive villager trading hall, i added in all my farmers and librarians so far (will add more soon) pretty much my farmers are working amazing but my librarians arent restocking or changing trades automatically i can replace their lectern and put it back to change trade but i really need it to happen automatically i dont have much time to do that but the main thing is them not restocking trades. any help would be wonderful thanks in advanced!