Installation of Sample DB fails

I try to install the Sample DataBase a second time. I Uninstall the existing Sample DB and then i install the new one. During this an Error occures: Error 27504.SQL version requirements not met: servername\INNOVATOR. This installation requires Microsoft SQL Server 10.50.1600 or later. My Version of the SCL Server is: 13.0.4435.0 Any Hints?