Updating forms via API

Hi - we’re looking to bulk update our forms with hidden fields via forms API

Update a form definition - HubSpot docs

But hitting the error 'There are too many fields in this group. A group should be no more than 3 fields." But we’re using the form definition that has been pulled from the API which has more than 3 fields per group.

Any ideas? I have a feeling the API might only support legacy forms