how to implement uid based upgrade system for a tower defence game

Hello, I am making a tower defence game and i was wondering if there is anyway to implement an upgrade system that is based on the uid of the tower. or if there is any other way to implement this system (i will be making a upgrade system similar to Balloons Tower Defence)

bradleyadam.itch.io/tower-defence-game-prototype - if you would like to see/Follow the development of the game