For those who are unfamiliar with just why this is happening, CCP Games explained this past September that this new item requirement was meant to make losing a structure more impactful as well as to deter players from simply building dummy structures as bait. So while that might have been a clever tactic before, as of this new update, it’s now verboten.
Content retrieved from: https://massivelyop.com/2021/01/13/eve-online-now-makes-quantum-cores-in-structures-mandatory-with-latest-patch/.