Delete MobileMe old keychain sync

[Ashwee]

I've recently got myself a new PowerMac and re-subscribed to MobileMe, but it keeps giving me a password box for the Keychain of a old iMac G5 I sold a few years ago, how do I stop this!
I've attached a picture of the problem, hope someone can help.

 

[mindvomit]

Check out this previous thread

https://forums.macrumors.com/threads/627782/

this seems to have done the trick for me.