DDNS Issues after re-install of Sophos XG

Question

Hi 
 Have installed a new XG running 17.1 but even though I restored from a backup and applied the same serial number I still get. 
 Failed 
 Hostname already taken. 
 
 Any ideas? 
 
 Thank 
 
 MM

sachingurung · Answer

Hi Moeller, 
 Is it the same appliance that you registered your DDNS hostname to? Or did something change on the hardware side? 
 I would suggest you, downgrade to the previous version which must be available in the Backup & Firmware > Firmware section , then deleting the DDNS configuration and switching back to the latest version and finally, reconfiguring the DDNS hostname entry. 
 If you still face an error, get a case registered with support and our CIS team will be able to fix it by unbinding the database record for the hostname entry. 
 Thanks,