Asynchronously set field definitions on a study schema. Requires administrator permission on the schema, Studies to be enabled, and updates to be allowed for the schema's study type.

Include every existing field, including archived fields, in the desired order. Provide a field ID to update an existing field; omit the ID to create a new field. Omitted update attributes retain their existing values. To archive a field, set archived to true and provide archiveReason. Omitting a field does not delete it and causes validation to fail. Configured schema field limits apply.