So cool! Is this their first time? What strains are they? Maybe sometime you could breed them for fry?
If you don’t want aggression, remove, scrape off the eggs. The parents will eat them and once you add the other discus back they won’t have anything to protect/be aggressive about. This has worked for me when my pairs get really aggressive. I had a pair that was so fearless they would lay eggs in a community tank and guard the eggs like there is no tomorrow.