In the WNBA, a team can "core" one player at a time, retaining their sole negotiation rights and allowing them to sign said player at the supermax. Each player can only be cored twice, and each "coring" lasts the duration of that player's contract. This takes control away from the players, which is why they may fight to exclude it from the next CBA. Now that Stewart's two cores are used, the Liberty could turn and use it on Ionescu. In doing so, they retain her sole rights, but she may then opt to sign one-year contracts to make the cores expire faster.