I had to reinstall the vceneter because I couldn't get back in it. Now that is backup, I can see all my servers but I can't connect because of licences key in the vcenter doesn't work. Is there a way to release the license so I can use it ?
Check this article and it will help. This issue is due to stale license from your old vcenter
Unable to remove license key from vCenter server 6.0 due to stale licensing entry in VMware Director...
VMware Knowledge Base
Note : Ensure to backup vcenter and its database before changes
Thanks,
MS