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Until patch 5.57 or 6.0, i dont remember quite precisely on this, but you could NOT store Zodiac Zeta relics originals anywhere, nor armoire, nor glamour dresser. Me as someone who already done multiple Animas, most part of Eureka relic and Resistance weapon, with old smaller size main hand inventory thought - i will just repurchase my replica when i need, to not use the inventory slot right now. And discarded the Zeta relic original. Now i stuck with not being able to purchase relic i done, even thorugh i have title and achivment, because Zeta relics replicas require you to posses original in your inventory (why would i even purchase replica if i have original?)

QoL idea is:
As Anima, As Eureka, As Resistance, make that you can repurchase Zodiac replicas at any stage without possesing the weapon original, as long as you have the achievment. I guess its only "relic of the past" that you can not repurchase the replica without original, and maybe we can unify it with the rest relics replicas system now?