SAP Message AH308 - Billing for contract &1 completed with document no. &2

Diagnosis
Billing for contract &v1& was completed with document number &v2&.

System Response
Update was carried out successfully. ERCH and EITR entries weregenerated, and the triggers in table ETRG were deleted. DBERCHZ,DBERCHR and DBERCHU records may have been written likewise.