Invoice split due to different price group

Hi Experts,

My business scenario starts from scheduling agreement -OBD- Commercial Invoice-Excise invoice - ARE3 Invoice

To address different prices in the scheduling agreement i have maintained the pricing based on price group.

The two line items falls different price group, it is fetching the prices correctly

but the problem is ,invoice gets split up because of different price group.

I know the control is in copy control VTFL- data VBRK / VBRP-invoice split, here VBRk-ZUKRI is not accounted with VBRP-KONDA_AUFT

Could you please help me to explain this split functionality in details to avoid splitting of invoice ..please

With regards,

Pratheep