A block is still in my mod after deleting it

When I was adding things to my mod, I created a block called "H" for some reason, I think I closed MCreator before or after I saved it (I forgot sry), or maybe I deleted it while it was saving the block.

I went in-game, and the block is in my creative inventory, but has a missing texture, and it's named "block.oxygen.h", so I think it's localised text and .json model was deleted (models are in C:\Users\user\MCreatorWorkspaces\mod name\src\main\resources\assets\mod name\models\block)

I also tried giving it a translation (I named it "Test"):

and in-game, it was renamed to "Test" inside my inventory, but I still couldn't see it in my workspace.

So is there a way to delete it or edit it so it has a texture?

Sorry if this was the wrong place to put it, I didn't think it was a bug, also if you need more information, tell me and I'll edit this.