This error comes when there is already an SmartX Server (AS/AS-P) added under the Enterprise Server and trying to add a new server whose backup is duplicated from the already added server.
It is likely that user has cloned or created a copy of already added server and then trying to restore in another server.
If you need to have the same configuration as that of already added server, login to the Automation Server individually and while restoring the backup, also tick 'Restore configuration with new IDs'.
Refer this webhelp link to see the correct procedure: https://ecostruxure-building-help.se.com/bms/topics/show.castle?id=10235&locale=en-US&productversion=3.0
It is likely that user has cloned or created a copy of already added server and then trying to restore in another server.
If you need to have the same configuration as that of already added server, login to the Automation Server individually and while restoring the backup, also tick 'Restore configuration with new IDs'.
Refer this webhelp link to see the correct procedure: https://ecostruxure-building-help.se.com/bms/topics/show.castle?id=10235&locale=en-US&productversion=3.0