SAP Message U7009 - Change billing period &1 <> &2 (meter readings &3 &4)

Diagnosis
Meter reading documents &V3& and &V4& have the differentBillPer indicators &V1& and &V2&.
These documents were entered on the same day. As a result, theycannot be consistently processed.
A possible cause of this is an impermissible change in theCustomizing settings of SBP/JBP.
Note:
The system expects meter reading results that come from one register onthe same day to be entered with the same category.
INCLUDE ISU_SAP OBJECT DOKU ID TX