If the contract is true, then that's mind boggling amount!! and now players and agents (especially the elite players who's clubs are desperate to keep like Mane & Salah for Liverpool or KDB for City) will push for much higher salaries during contract renewals, citing Messi's contract, of course no club in their right mind will sanction anything close to Messi's money for any player (Barcelona did it because "it's Messi" perhaps), we will hear the players and agents demanding something like 400K a week which is only a 1/5 of Messi's money!!
Neymar's transfer fee opened the door to transfers exceeding the 80M as a norm (before Neymar, only Ronaldo, Bale & Pogba were sold for more than 80M pounds, post Neymar, we have Mbappe, Dembele, Greizman, Joao Felix, Hazard & Maguire went for 80M or more since 2017).
So now, the leak is problematic to clubs, players and agents might start demanding much more or threaten to leave.