Git Credential Manager for Windows dialog continually displayed for non-existent stash server

After updating to v3.0.6 recently (and now using v3.0.8), I am getting VERY frequent prompts to enter credentials for an old stash (Bitbucket Server) URL that is no longer in existence. I cannot find any place where the URL to this old server is referenced. None of my repos in SourceTree reference it and the Authentication tab in Options does not reference it.

Prior to updating to v3.0.6 I was not getting this prompt. I am currently using embedded Git. 

Since updating to v3.0.8, I am getting two separate prompts (see attachments)

I also started this post on the Community forum regarding this: https://community.atlassian.com/t5/Sourcetree-questions/Git-Credential-Manager-for-Windows-Popups-in-v3-0-6/qaq-p/917669?utm_source=atlcomm&utm_medium=email&utm_campaign=immediate_general_answer&utm_content=topic&lightbox-message-images-922733=35760iA6511A7823C10A84