Steps to reproduce:

1. Insert a vanilla enchantment book that has a Zenith-namespaced alternative, such as minecraft:protection or minecraft:sharpness.
2. Attempt to withdraw the minecraft enchantment from the library
3. The book will either disappear and the enchantment will re-appear in the library's list after resyncing with the server, or the chunk will become corrupted.

Expected behavior:
Duplicated enchants can be inserted, but all enchantments should withdraw normally.

Alternatively, upon inserting the minecraft version of a Zenith-modified enchant, it could change to the Zenith version instead of creating a separate entry.

(I'm not sure which of these Apotheosis does)