condition record exists, removed manually ( msg 008)

Hi

I have tried blog available. still not getting issue solved.so posted

we have  tax 0% condition in item level pricing in invoicing , it is there.still msg comes condition record exists, removed manually .( msg 008)

1. tried condition is not able to delete manually

2. tried note 27636

3.cheked routines..also working

pls assist.

Regd

Sachin