Thank you all for your valuable insights - I hope one day I will have your expertise and be able to help follow flyertalkers like you do with me

From my understanding A3 will not like that and will communicate it to me (hopefully?) and try to cancel one (if not both?) of the tickers. I think I will take the initiative and contact them before they do, in order to cancel one of the two.

Reason why I have two, is similar as one of Tennen , one was paid in Light Economy (U - non refundable) and one being Business (kind of award flight, but not exactly, anyway was not paid, except from taxes). Reason I don't want now to cancel the Light one is that, my decision to fly Business or not depends of my fellow companion. If he travels business, great, if not, I prefer to sit together in Economy and change the Business for a future day.