According to Spanish radio station "Cadena Ser", an agreement was written into the Coutinho move stating that Barcelona can not sign another Liverpool player for another three years, unless Jurgen Klopp's side actively choose to allow the player in question to join the "Blaugrana". It was a similar story with Luis Suarez, who made the same switch in 2014.
The English club were insistent on the clause, of which one season has now passed, meaning Barcelona can not sign Liverpool players for another two seasons.
Coutinho had been determined to leave the Reds in favour of a move to Spain and Liverpool were eventually forced to cash in on their main asset.
The Catalan giants signed Couthino for a massive £142m deal in January but Liverpool apparently insisted on an agreement that will all but prevent Barca from signing any more Reds players until 2020. Barca came back in for him in the winter window, breaking up Liverpool's superstar quartet of attackers and, presumably, incurring the $114-million premium.
That will relieve plenty of Liverpool fans, given that Barca have been linked with the likes of Sadio Mane and Mohamed Salah recently.
The La Liga champions would have to pay an extra £89m on top of any transfer fee if they did try to lure a Liverpool star away.
Coutinho has five goals in all competitions for Barcelona this season.