I had an issue on my backup1 DC host, so I deleted from the maser DC, and installed again on a new virtual machine. But now after the join, I can't login and when I do a system diagostic on master DC I have an issue about the key. It's seem they still old information from the old backup1 machine on the Master DC, so impossible to do a clean join.
Copy from the System Diagnostic result:
SSH connection to UCS server failed!
The ssh connection to at least one other UCS server failed. The following list shows the affected remote servers and the reason for the failed ssh connection:
backup1 - Host key for server does not match!
Host key for server does not match - The ssh host key of the remote server has changed (maybe the host was reinstalled). Please repair the host key of the remote server in /root/.ssh/known_hosts on master.corp.medair.org.
Thank you very much !