I lay wheel on floor, wrap a rag around the base of the cassette, and with flat blade screw driver and hammer, tap the individual cassette cogs to get them to unseat from the notches they’ve cut into the freehub body. Usually one at a time, until you reach the spider mounted cogs, this should come straight off.
You can dress the body with a steel file to take the burrs off, and refit the cassette with some anti-seize, but it does not really help, and I’ve suffered from the gouges in the body getting worse, clicking and creaking noises under power and even shifting dwell as the cogs have ended up out of alignment
The only solution is to swap out the alloy body for the steel body, after the 3rd one went on my road bike, Hope gave me a steel body FOC.