Please check your SolMan patch level.For EHP7 minimum SolMan patch level is
SolMan 7.0 EHP1 SPS23 and higher
SolMan 7.1 SPS5 and higher.
IN SolMan LMDB --> Technical System - please check the product version. It must be ECC 6 EHP4 ( since your system is EHP4). From the same screen perform the folloiwng steps - in "Adanced" button "Resync Technical system from SLD".
Also defining or selection system - use only "SAP ECC 6.0" as I have mentioned in the attached screen.
Thanks,
Dipam