Procedure for Existing Print Documents During Upgrade 

If you upgrade to SAP IS-U 4.63 system from a previous IS-U release, SAP IS-U/CRM integration marketing requires that the existing consumption data is transferred to the Consumption History table (DBERCHV). Either the installation facts in the Installation Facts (Normal) table (ETTIFN) or the bill line items in the Individual Line Items (DBERCHZ) table can be used as a source for the consumption data.