Click the see inside and read the note
I tried to make a block, It glitched, It now has no define!!! And runs forever!! Click edit block and there will be no trashcan symbol, That means nothing to remove, It thinks it has a define though, So strange!!! You cant even move it through Backpack!! Could this be a new bug from Scratch 3.0?? Yeah its fake lol, But it is in the editor,