condition want to delete

Dera Experts,

I have an issue with export billing, while doing export we have mentioned twice zbp1 condition type . first condition type zbp1 with zero and second condition with 100 eur. since we have done billing also .and now while takeing the print out its picking first condition type zbp1 with zero value , since it is standard programme. we cannot check with abaper, can i delete this condition type zbp1 with zero value, after invoice is it possible to delete, pls suggest me, not able to delete at sales order,

Thanks

Raj