SAP Message AJ477 - Control of billing in advance is not standard in the IF-ENDIF clause

Diagnosis You use value &V2& in schema step &V1& to controlbilling in advance. However, the corresponding IF variant has valueV3. this is not allowed. the control for billing in advance must havethe same value everywhere within an IF/ENDIF clause. Procedure INCLUDE ISU_KORR OBJECT DOKU ID TX