Debug

bug.py

# forms
# ...
AlbumUpdateForm = model_form(Album, db_session=Session, 
                            exclude=[Album.create_at])


#views
# ....
    if request.method == "PUT":
        form = AlbumUpdateForm(request.form)
        if form.validate():  # error is here
            form.populate_obj(album)
            album.save()
            return album.json()
#...
"""
{
    "name": [
        "Already exists."
    ]
}
"""