Senna Miangue is in Sardinia to undergo his medical at Cagliari before completing a move today FCInterNews.it report. The Belgian will join on loan until the end of the season with a redemption option. At the end of the season both clubs will take stock of their second half of the season before carrying out the redemption option. There is also a gentleman’s agreement that would allow for Cagliari to hold on to Miangue for a further season.
Source: FCInterNews.it

This article is really confusing. It’s not clear at all whether there’s actually an option to buy or if it’s just an option for him to stay there an extra season.
I don’t know why we’d sell him. He’s looked as good or better than any of our current fullbacks when he’s played, he’s got center-back height, and he’s still a teenager!
We don’t know what is happening behind the scenes. We should just wait and see who is coming in this and next transfer window.