Last year they had qualifying for the sprint race and the sprint position determined your grid position for the full race.
This year they have qualifying for the full race, then qualifying for the sprint race and your position in the sprint race has no bearing on the full race.
It’s like a mini race weekend in the middle of the actual race weekend.
tomorrow there's just a mini quali and race that's independent from the normal quali (that we just had) and race (save for the tires used and parts destroyed). Oh and there was just a single free practice instead of 3