Sugar API "assigned_user_id" field "IsNull=false" metadata wrong value

Hi all!

I have an automation script that generates and validates CREATE post data based on the "/metadata" configurations for fields.

In each module the "assigned_user_id" field is marked as IsNull=false, that indicates this field is required and no null value can be assigned.

Looking at the UI and the API it allows to add null value for this field. But the way this field is exposed on the "/metadata" prevents me from adding it as null.

Could you please confirm the right behavior?

Thank you!