Well the ones they were signing last year were on 8 year deals and amortised over that. so a 64m player would amortise at 8m on FFP every year. This was similar to the Derby trick wasn't it, they armortised players longer than their contracts, so that they could spend more now. It's gambling future revenue.
That has been stamped out by UEFA so can only amortise over a max of 5 years now.
This Caceido 100m contract, will be 20m on the FFP this season. all their signings this season will be 60m on FFP this year, and every year for the next 5 years. But, wait, they also have to add 1/8th of last seasons transfers, which is about another 75m. So FFP they will be down about 135m this year on transfers alone.
Balancing that off though, they've sold 215m in players this season. So I guess they are fine this year. But to stay fine they will likely need a big sale every year, and two if they want to buy anymore players.