Have you heard about the transfer ban? We are currently facing one. We're letting him go, then what?
But even if it's postponed we only have 3 CB's, having DL in the squad is ok. He is not in his prime anymore but still we managed to reach 3rd place and EL-final with him, we can use still use him. Ofc I would be happy too if we could sign another CB but with this current situation this extension had to be done.