A SQL Server instance is already installed on the secondary site server using the instance name CONFIGMGRSEC, or the specified ...

A SQL Server instance is already installed on the secondary site server using the instance name CONFIGMGRSEC, or the specified TCP port is being used by another SQL Server instance, or OS version is not Windows Server 2008 sp2, Windows Server 2008 R2 sp1 or higher. Setup is unable to install SQL Server Express on the secondary site.