Error when get total of linked account

See below error details:

> > > total.values('linked account id')
> > > Traceback (most recent call last):
> > >   File "<stdin>", line 1, in <module>
> > >   File "D:\python\venv\lib\site-packages\details\costs
> > >     if lineitem[column]:
> > > KeyError: 'linked account id'
> > > total.values('linked account id')
> > > []
