[Freeipa-users] ipa-server-install: "does not match the primary host name" - unable to work around

Hallo! I have been trying to install FreeIPA server and keep hitting this error message: "ipapython.admintool: ERROR The host name [hostname of the local machine] does not match the primary host name [hostname of ANOTHER machine]. Please check /etc/hosts or DNS name resolution" I am at my wits' end. The machine has two NICs, one public (which shall serve the FreeIPA UI) and one private (which shall serve the actual domain services). /etc/hosts has entries for the public name for both IPv4 and v6. No amount of fiddling with parameters to ipa-server-install lets me get past this issue. Most frustratingly, the second hostname in the message is from a wholly different machine, the only connection between the two is a private VLAN on the second NIC of the local machine. I have no clue where it gets that hostname from in the first place. /var/log/ipaserver-install.log gives me: " [...] File "/usr/lib/python2.7/site-packages/ipaserver/install/server/install.py", line 455, in install_check raise ScriptError(e) 2019-07-27T09:13:33Z DEBUG The ipa-server-install command failed, exception: ScriptError: The host name epicurus.cds-infra does not match the primary host name lucan.cds-infra.de. Please check /etc/hosts or DNS name resolution [...]" I tried under both Fedora 30 and CentOS 7.6, with no difference. Has anyone encountered a similar issue, and hopefully solved it? Thank you! Regards, Florian