As of v18, TokenEnchant has its own Enchantment ID management system for pre 1.13 servers. Before you upgrade your TokenEnchant to v18, it is strongly recommended to install this tiny plugin to generate "enchantIDs.yml" file which lists all registered enchantments and their IDs.
Once you generate "enchantIDs.yml" with your pre TE v18, you can install TE v18 and copy the generated "enchantIDs.yml" into TokenEnchant's plugin folder. Then TE will maintain your old IDs under TE v18.