I'm trying to get this command to work:

start /wait d:\setup.exe addlocal=SQL_Engine instancename=MSSQLSERVER upgrade=SQL_Engine skuupgrade=1 /qb

But I get error that the upgrade is blocked because the existing component is a later version than the version you are trying to upgrade to.

It does have sp3, but I thought that would be lost with the upgrade.

Am I doing something wrong, or just out of luck and have to resort to the uninstall/install plan?

Any ideas are grealy appreciated.

Thanks!