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FortiZiq
Staff
Staff
July 22, 2025

Troubleshooting Tip: Installation Validation failed with error 'object: last-updated. detail: not allowed to change'

  • July 22, 2025
  • 0 replies
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Description This article describes how to troubleshoot issues when the FortiManager Installation Validation steps fail with the error 'object: last-updated. detail: not allowed to change'.
Scope

FortiManager v7.4.7 and above.

Solution

Users may see the following error on the 'Validate Devices' step of the Install Wizard:

 

validate_devices.png

 

log_cli_template.png

 

The error appears on line 6 in the example. However, the actual object that is causing the error is 'last-updated', which is actually on line 57 in the example.

 

last-updated.png

 

FortiManager does not allow changes to the 'last-updated' value. To fix this, simply remove the line that is causing the error from the CLI Template.

 

removed_line.png

 

The error should now be gone, and Installation Validation should be successful.

 

validate_devices_success.png

 

Troubleshooting:

 

diagnose debug application securityconsole 255

diagnose debug enable