(accessed from chrome browser)

Hello, I recently attempted to add a new tag to an email.  I named the tag and chose the color. However, there was a delay in the system being able to apply it after being saved so I added another, then another, then another.  A minute or so later, all the tags showed up assigned to the email and in the tags list.  Now there are four tags with the same name and the same color... which is undesirable. I checked in settings and the only option to work with tags is to either enable or disable.  The entire feature has become unusable so I have disabled it. 

Is there a way to delete or at least rename/change color for existing tags in Zoho Mail?