[Freeipa-users] Better to Backup / Restore to new server ?

Hello I need your recommandation about the upgrade/restore from FreeIPA server actually in V 4.5.0 APIV 2.228 to V4.6.4 API 2.230 or last. Is better to Backup / Restore from the old to New IPA server, or to start ipa-server-upgrade from the old server ? As you know my old IPA version use the bgp key for replication, that mean i need to stop/suppress the replication before and i upgrade the old servers ? Thaks you, for your help. Regard