The following files have been updated and must be reset for the changes to apply. These resets ARE mandatory, things may break and noted bugs may remain if you don't.
- skills/trading_progression.yml (NG+ smithing reset fix)
- trading/trades.json
- trading/types.json
- items.json (back up any of your own items first)

If you are not aware. Resetting a file means to DELETE the file while the server is OFFLINE, then starting the server (counts for most plugins, this restores the default file).

FIXED Traveling merchants not being saved or loaded properly
FIXED Severe issue where the enchantment modifiers were amplifying themselves
FIXED Certain enchantments being defined at such a low level that librarians basically couldn't reach higher than level 1 despite being very skilled
FIXED Resetting villager progression no longer breaks existing villagers,
FIXED Exploit where the cost of upgrading services could freely be taken from the inventory, basically infinite emeralds,
FIXED Improper formatting in upgrade options buttons,
FIXED Trading NG+ resetting smithing instead of trading
FIXED The trades in the ordering service sometimes randomizing when clicked. This was caused by certain villagers being configured to sell a random item through a modifier instead just having a trade for each item in the list.