I doubt the Vlahovic to PSG transfer would still work.
I saw a news report today where some PSG ultras help up a banner than said something like like "if Vlahovic goes to Paris they will cut off three of his fingers"
Details of the report said the issue came from a time when Vlahovic made a certain celebration after scoring or whatever. I don't know how serious that might be, but things like this can be serious enough for the player or the club or both parties to start having second thoughts.
Juventus wants to sell Vlahovic because they need to sell to balance their books and they need money. It's not because they don't need him any more. I believe it they get Lukaku they would sell Kean.