Exastiken

So people can have multiples and try different forma builds on these items, instead of having to swap mod polarities when mod capacity is insufficient. Also, getting duplicates were stated to be a cross-save feature, so DE will not be removing them AFAIK.

Several users have stated that they have received multiple Skiajati, Paracesis, and Excalibur Umbra frames from merging accounts during the cross-save Excalibur Umbra, Paracesis, and Skiajati are frames and weapons that can not be sold, and not be crafted again. Please allow players who miss the cross-save merge period to purchase blueprints to craft them again from Cephalon Simaris or another vendor, to allow users to experiment with different forma builds and mod configurations.

https://news.tfw2005.com/2023/07/28/sdcc-2023-hasbro-show-floor-qa-legacy-studio-series-video-games-more-488215