Solution : https://service.sap.com/sap/support/notes/864650 (SAP Service marketplace login required)
Key words : 
terms backup restore init config db_activate reason, external backup tool, sap service marketplace, instance version lower, database server version, homogeneous system copy, restore reports, system copy, dbmgui version 7, internal command
Related Notes : 
       
| 129352 | Homogeneous system copy with MaxDB (SAP DB) |