How do I move the failover IP from my old server affected by the Strasbourg incident to a new server?

If your server was initially hosted in Strasbourg (SBG), you can migrate it to another server in France. To do this, please follow this guide: https://docs.ovh.com/sg/en/dedicated/ip-fo-move/
To configure the IP on your server, please follow this guide: https://docs.ovh.com/sg/en/public-cloud/configure_a_failover_ip/