SFTP from zos server to several remote servers

[jllamas]

hey Experts,
I have some doubts about connections between a zos server and several remote servers. From my ZOS server we have already one SFTP connection with another server, and for this the file known_hosts and keys id_rsa and id_dsa were generated. Now we have been required in order to add a new SFTP connection to another server.
I am confused about this new connection... I should add new connection to known_hosts and use with this new server also the old keys id_rsa and id_dsa ?.... should I generate all again? (if yes how can I make it without replace old keys?).. obviously I need the SFTP connection with all remote servers works fine.

Thanks in advance for your support .. I really appreciate it