Host key verification failed

[yena]

Hello,
just added 2 new nodes to my cluster, without errors, but when i try to replicate i have this error:

2019-06-18 10:44:01 108-2: (remote_prepare_local_job) Host key verification failed.
2019-06-18 10:44:01 108-2: (remote_prepare_local_job)
2019-06-18 10:44:01 108-2: end replication job with error: command '/usr/bin/ssh -e none -o 'BatchMode=yes' -o 'HostKeyAlias=exnov6' root@10.10.10.6 -- pvesr prepare-local-job 108-2 KVM:vm-108-disk-0 --last_sync 0 --parent_snapname vpnGestOKRdpOpen' failed: exit code 255

Any ideas ?
Thanks!

 

[yena]

I have solved doing this:
on the sender node:
ssh Dest_Node_Server
Save the key
Done

Maybe why i have used command line to add node to the cluster ?