Updated for 1.21.4 (Will NOT Work in Old Versions)

To upgrade items broken by the update, put them in your inventory, then run the following function(s):

/function minimobtoy:upgrade/1_21_3_to_1_21_4_single (only upgrades for person who runs function)

/function minimobtoy:upgrade/1_21_3_to_1_21_4_all (upgrades for all players in server)