To create exhibitor children associated with an existing exhibitor, employ the /api/v2/exhibitor/set endpoint. To link child entries to an exhibitor, use EP's matching method to identify the exhibitor and then use the specified fields.
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event_id:The unique identifier for the event (integer) -
exhibitor_id:Exhibitor´s ID (integer) -
children_exhibitors:Children exhibitor IDs separated by comma, will be saved only if is_parent_exhibitor is true