Imprinting aspects from codex - eviltoast

I got the Sacrifice aspect from a dungeon and it looks pretty nice for my Necro blood build, but I’m afraid to use it. It will only apply to a weapon, and my current weapon that I want to keep is legendary, with an aspect I imprinted on it (blood surge echo, means I get a free blood surge effect every time I use it). If I imprint Sacrifice I will lose this imprinted aspect, and I cannot remove it, if I understand correctly. Is that also the case with the aspects I find when completing a dungeon? I’m going to need to replace this weapon at some point soon, when I get a better one, but I don’t want to lose the aspect…