AoR CRB says +1 to melee defense.

and EotE CRB says something different. thats very unfortunate.

Soo, do we think and agree that newer book trumps older book or is the new book the one mistaken?

I do. This was answered by the devs so clearly they changed the verbiage in the new book to match their decision on using thi maneuver twice.

Will +1 to melee defense be added to the errata for EotE book then? If so when?

That is the only CRB that I own and therefore I go by the rules in that book along with the errata.

That's your table and your decision but expecting an errata when they've published amended verbiage in a new CRB might end up being a long wait.

Guys...it's one extra setback die. Not gonna break your game one way or the other that said, I can appreciate the desire to stick close to the RAW. But always try to rule in favor of the players.