Node-restart-helper pod failed!

[Sayyadd]

I get the following error inside node-restar-helper pod:

Warning: Permanently added '10.0.80.173' (ED25519) to the list of known hosts.
Load key "/data/ssh-privatekey": invalid format
Permission denied, please try again.
Permission denied, please try again.
Received disconnect from 10.0.80.173 port 22:2: Too many authentication failures
Disconnected from 10.0.80.173 port 22

I created id-rsa secret form ssh key which I am using for ssh to server but getting error. Please help.