I’ve just installed ArcGIS 10.6.1 and a bunch of patches. I did not uninstall the previous version of ArcGIS. After the install, I changed the license to concurrent. The problem is the license is pointing to the wrong license manager (LM) and the ArcGIS administrator is showing both host names. One on the left hand side above “desktop” and the second on the desktop tab near the change license manager.
I’ve determined that my local user account is nested on this host name but I’m not sure what to do with that information but maybe it’s a clue?