Hello SunnyHB
From a legal perspective you (resp. your companion) are travelling with an invalid ticket. The conditions are clear before purchase, see screenshot below.
I am unable to say whether or not you should travel with this ticket. If you do, be aware that the conductor has the right to fine your companion with a CHF 90 surcharge plus a new ticket. It is your full responsibility and decision, though.
Best wishes,
Roland
