I can't edit the loot table registry name and namespace

I'm using MCreator 2021.1 forge 1.16.5. I made a loot table for my vase block, but when I made it I didn't understand how the registry name worked. Now I want to change it from vase_loot_table to blocks/VaseBlock, but I can't click on the registry name or namespace to edit them and I don't know why. I tried quitting and restarting but that didn't do anything. I don't want to just make a new loot table because it takes ages. Anyone know how to fix this?

Edit: I'm also having a problem with a "ghost" block. When I quit and restarted MCreator it didn't save my vase block so I made a new one, but when I load into worlds it spawns both blocks and acts like it's still there, but it won't show up in the workspace.