[18.0][OU-FIX] purchase_stock: Don't use an unexisting field#5400

pedrobaeza merged 1 commit intoOCA:18.0OCA/OpenUpgrade:18.0from

Tecnativa:18.0-ou_fix-purchase_stockTecnativa/OpenUpgrade:18.0-ou_fix-purchase_stockCopy head branch name to clipboard