gistfile1

Rename UUID host "testcore1" to "gsscore2". We get a popup:

Conflicts have been detected
The following entries were found conflicting with what foreman wanted to apply.

Please review them carefully, if you are certain that they should be removed, please click on overwrite.

DNS PTR Record 192.168.100.56/testcore1.devops.office.etvinteractive.com already exists
Additionally, we are about to perform the following actions
Remove DNS record for testcore1.devops.office.etvinteractive.com
Remove Reverse DNS record for testcore1.devops.office.etvinteractive.com
Create DNS record for gsscore2.devops.office.etvinteractive.com
Create Reverse DNS record for gsscore2.devops.office.etvinteractive.com

Logs Show:
DNS PTR Record 192.168.100.56/testcore1.devops.office.etvinteractive.com already exists
Failed to save: Conflict DNS PTR Record 192.168.100.56/testcore1.devops.office.etvinteractive.com already exists

Click "ACK" then "Overwrite" and we get redirected to:

http://foreman-dev/hosts/gsscore2.devops.office.etvinteractive.com

which is 404 because the rename hasn't happened.

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Rename AND change the IP, then everything works. So the rename isn't handling the IP conflict well.