Can't buy the replica of Zodica weapon zeta.

[Rasula]

Date & Time: 2018/5/15
World name: Ultima
Character name: Rasula Alcyone
Error by NPC
NPC name: Drake
Class/Level: Black Mage/70
Party or solo: solo
Area and coordinates: North shroud



I can't purchase the replica of Zodiac weapon zeta, but I finish the whole missions and get the title of Zodiac weapon.(Lilith Rod for BLM)
But I can purchase the Kettle,is this normal?
Or it's because I discarded the Zeta weapon(Lilith Rod)?
I don't want to lost the thing that take so much time it's really frustrating.


I send a mail asking about this and GM told me to post a bug report here.
Huge thanks for everyone to reply.