https://central.xero.com/s/question/0D58V00009SHuxJSAT/-iberia-%F0%9D%94%B8%F0%9D%95%9A%F0%9D%95%A3%F0%9D%95%9D%F0%9D%95%9A%F0%9D%95%9F%F0%9D%95%96-seat-upgrade-policy-https://central.xero.com/s/question/0D58V00009SHuxJSAT/-iberia-%F0%9D%94%B8%F0%9D%95%9A%F0%9D%95%A3%F0%9D%95%9D%F0%9D%95%9A%F0%9D%95...