Changing Username of Editors

Hi, I want to change the username (or URL) of users on my website. I’m using User Role Editor on my website currently.

I want to change the URL (username) of some of my old editors and it won’t let me do it. I cannot delete the users and create new ones as this will also delete/damage data published by old editors.

Is there anyway possible to do it? I’d appreciate your help. I can also make changes in core file if needed, please let me know.

TIA!