Hi @A_Wyn_Jones
Thank you for your insights and for sharing the documentation.
We have made sure that the new machines on which ArcGIS Enterprise is installed is of the same version.
In our case, the new machines on which ArcGIS Enterprise is installed are on a separate network from those from which the backup was created.
Hence, I was wondering if the backup file could be moved; otherwise, how can the import version of the properties file look for backup file.