The data transfer from the previous device carries unique identifiers for SEP Mobile along with the app. This can cause the management console to see the new device as being the same as the old device.
This issue can typically be resolved by removing SEP Mobile from the old device and re-enrolling it again through MDM.
To prevent this issue, it is recommended that users remove SEP Mobile from their old device before completing a data transfer. Please note that it is also possible in some situations to prevent backup of SEP Mobile data to iCloud via UEM policy. For example, Intune can enforce this policy for both corporate owned and BYOD devices.