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lucianag22
Staff
lucianag22
Staff
January 26, 2026

Troubleshooting Tip: Failed to upgrade FortiSIEM Cluster from 7.3.x to 7.4.x

  • January 26, 2026
  • 0 replies
  • 147 views
Description

This article describes how to solve the error 'ERROR: Failed to add public key to Worker_IP_Address:Permission denied, please try again.' when trying to upgrade FortiSIEM Cluster from 7.3.x to 7.4.x running python script.
Scope FortiSIEM Cluster.
Solution

The following error may occur after running the cluster upgrade Python script from the licensed Supervisor node:

 

ERROR: Failed to add public key to Worker_IP_Address:Permission denied, please try again.
Permission denied, please try again.
pghauser@Worker_IP_Address: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).

 

Check the following command on the licensed Supervisor node:

 

cat /home/pghauser/.ssh/id_rsa.pub

 

After, paste the SSH Public Key on the worker node to fix the error. Ensure a backup of the file exists before proceeding. 

 

cp /home/pghauser/.ssh/authorized_keys /home/pghauser/.ssh/authorized_keys.origin 
vi /home/pghauser/.ssh/authorized_keys

 

Next, try to run the upgrade script python fsm_cluster_upgrade.py again.
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