The Original/Old Server, from the PLEX Friend, is Main Server & Will NOT Delete, When Should ONLY Be The Remote & New Server, from the PLEX Friend, also available, but NOT Main Server

Hmmm.

Note: 1.18.7.2457 is the current public Plex Media Server version, and he’s using the same app version you are. I don’t know what server version your friend is using now, but it’s very possible you are experiencing this same problem as this other user.