DS414 is a 32-bit ARM model and cannot be migrated directly to the platforms that XPe supports.
Regardless, you should install DSM clean on an XPe box, then copy your data instead of migrate so that you are not hit later with the 16TB volume limit coming from the 32-bit platform.
FMI: https://www.synology.com/en-global/knowledgebase/DSM/tutorial/Backup/How_to_migrate_between_Synology_NAS_DSM_6_0_and_later