Server 5.5 Clean Install on High Sierra
I've got a Mac Mini that previous ran Server 2.2.5 and Mountain Lion which I've upgraded to High Sierra. I want to install Server 5.5 on this but get an error message "Unable to set up Server" " This version of Server does not support upgrading Server data on this volume ....." I don't care about the old Server data. How do I force a clean install of Server?