When trying to delete a no-longer needed datum export task, ran into the following error:

ERROR: update or delete on table "user_export_datum_conf" violates foreign key constraint "user_export_task_user_export_datum_conf_fk" on table "user_export_task"

Either existing tasks should be deleted by SolarUser first or the user_export_task_user_export_datum_conf_fk constraint could be changed to CASCADE.