SAP Message RSM810 - Source system & does not exist

Diagnosis
Source system &V1& is not known.

System Response
The imported data for InfoPackage &V2& has been deleted again as thereferenced source system &V3& does not exist and in table RSLOGSYSMAP,no mapping is defined for an existing source system.

Procedure
In the Data Warehousing Workbench, create the referenced source systemV1 or in table rslogsysmap, define mapping to a known source system.
Use transaction SM30 to access the maintenance screen. Enter tableRSLOGSYSMAP and execute your entry.