Try to set inventory_unit.line_item on Importer
Try to set inventory_unit.line_item on Importer

To avoid exception when users want to display those imported orders in
admin

Mayvenn/spree,dotandbo/spree,Mayvenn/spree,dotandbo/spree,yomishra/pce,yomishra/pce,dotandbo/spree,yomishra/pce,Mayvenn/spree,dotandbo/spree,Mayvenn/spree