The search-config-v2 has conditional fields:

https://github.com/mozilla-services/remote-settings-permissions/blob/6aac3b383980e0d210d05b58827b8500c8e695d6/kinto.prod.yaml#L3399

And defines:

          uiSchema:
            ui:order:
            - recordType

So it gets errors like:

• Invalid "root" object field configuration: uiSchema order list does not contain properties 'base', 'notes', 'variants', 'identifier'.
• Invalid "root" object field configuration: uiSchema order list does not contain property 'orders'.