Palmeiras are upping their asking price for Yerry Mina.
Sport says The first Cule offer of €2m to sign him now, rather than in the summer, has been rejected by the Sao Paulo side.
The clubs have a deal for Mina to move to Barcelona for €9m in the summer after the Russia World Cup, where he will start for Colombia.
With Javier Mascherano heading out the Camp Nou exit in January, Barcelona want to replace him now.
Palmeiras have asked Barcelona to respect the existing agreement.