Why Fiorentina are not obliged to buy Zaniolo from Galatasaray despite loan clause

The article discusses the contractual situation between Fiorentina and Galatasaray regarding Nicolo Zaniolo, specifically addressing why Fiorentina is seemingly not obligated to finalize the purchase despite an existing loan clause. This likely pertains to performance metrics, clause fulfillment, or mutual agreement nuances within the transfer deal structure.