Username change question

B - when you get a chance... Karreybeths mo emailed for a username change. First choice was myguatbabes. Upon checking I saw that we already have this name AND it belongs to Nancy Wood, who is KarreybethҒs Mo. Karrey account was set up first in 2004 and myguatbabes was set up in March of 2006. Has no posts on myguatbabes, and hasnt used the account at all. So do I delete myguatbabes, then change Karry to myguatbabes? Or???