No such revision error: can I clear invalid vcs cache (Subversion) ?

I had a project for which I needed to deleted the repository in my SVN server and start afresh with a new one. Both have the same name. I used PHPStorm to work with the old one and now in the Changes window, Repository tab, I can't refresh anymore. PHPStorm is making requests for revisions in the previous repo and is getting 500 errors from the server. I tried to change some settings, invalidate caches, nothing works. Renaming my checkout solves the problem, but I would like to keep the intended name for my checkout. How can I force PHPStorm to clear its vcs cache? Thank you for your help.