How to pass values to sales group in invoice for rebate?

Hi,

I need to create a access sequence (Sales org/Sales group/Customer) for rebate. I created a new field Sales Group in rebate field catalog. I added a access to BO03 condition type and pass the values to sales group in invoice at item level because it is coming at item level. But when I created access it is KOMK table, in invoice it is moving into KOMP table. Value is not passing when I create invoice hence not finding condition record. Can you please help how can I map this?