Delete Keyword under Smart Bins

Hi, I'm using DaVinci Resolve 18.1.4 and just started learning it. I wanted to know that how do you delete a keyword under Smart Bins as I'm not getting any options on right clicking on that keyword and also pressing 'Delete' key doesn't do anything. Your answer is really helpful and appreciated. Thanks!

Did you create the Smart Bins manually, or with Preference>User>Editing>Automatic Smart Bins?