As long as all the citations are there, it should go quickly and update them-- but that is why on a copy, in case it doesn’t. Sounds like there might be some corruption (but I am still on Endnote 21). Cleaning up the real codes should remove any corruption. – with the paste in word, word did change the way the ctrl+shft+v worked, and is it possible you had the legacy behaviour and a new install is now in the “new” MS behaviour? I remember this happening to me in 2023 at some point…