Troubleshooting Tip: How to fix the Error '-651: Input value is invalid' when creating SD-WAN rules

When creating a new SD-WAN rule, the user may encounter an error code with the message '-651: Input value is invalid'.

On FortiOS v7.2.x and v7.6.x, the error will appear as shown below. 

Creating the SD-WAN Rule in the CLI will give the following errors: 

config system sdwan

    config service

        edit 1
new entry '1' added

            set name "Test Rule"
node_check_object fail! for name Test Rule

value parse error before 'Test Rule'
Command fail. Return code -651

The error is due to the space is not supported on the SD-WAN naming format. To fix the issue, remove the space between the words or add a '_' or '-' to separate the names.