This is a known issue (fixed in releases 22.1.4 any hot-fix after 2025-03-08) - Internal PR 123397

• When making changes to FP in device context we may end up getting RPC error & this can be any change we try to make,
  
  Error: RPC error towards ASCUSVGW01: unknown_element: /rpc/edit-config/config/org:orgs/org:org-services/sdwan:sd-wan/sdwan:forwarding-profiles/sdwan:forwarding-profile
  
  
• We can make changes on the template itself , however on the device context changes it will result in RPC error along with any commit attempts.
  
  
• Workaround:
  
  
  -- Apply the forwarding profile changes on the template (which will be successful)
  -- Before committing it to the appliance revert(removing nexthop-reevaluate-cgnat) changes as mentioned below and validate the commit changes.
  -- The commit should be successful.
  
  
  Just a example snippet (please remove the cgnat line by merging from left to right)
  
  
  
  In case above fails, and we are unable to upgrade the director - We will need to make changes on the device cli itself for any FP related changes