That's the view of West Ham ace Michail Antonio.
Barca want the Liverpool talisman to replace Neymar at the Nou Camp this summer.
The La Liga giants are said to be willing to pay £90m for Coutinho, 25.
And Antonio says Liverpool should sell the Brazil international, claiming his head has been turned.
He told BBC Sport's MOTD2 Extra: "As a player, Barcelona come knocking you go.
"But I feel Liverpool is doing the right thing for the club because he is their best player, he makes things happen from nothing and standing their ground is decent.
"But then again would you want a player that doesn't want to be at your club?
"I believe as a player, the club should let him go because his head has been turned.
"The effect it has on the group, the effect it has on the player himself.
"He's never going to be the exact same player because his mind and body is no longer with Liverpool.
"You've got to let him go because he's not going to be the same player that he was last year."
