Celta Vigo sporting director Marco Garces insists they're protected over the future of Oscar Mingueza.
It's been claimed Barcelona plan to trigger a buy-back option in the defender's contract in January.
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But Garces told AS: "Barcelona has the right to match other bids and to 50 per cent of a sale.
"But they don't have the right to a buyback clause."
Mingueza has a contract with Celta Vigo that runs until the summer of 2026.