How to fix Subversion lock error

How do you fix the Subversion/Subclipse error "Attempted to lock an already-locked dir"?

Googling shows people routinely encounter this error, and the only solution I've seen posted is to run Subclipse's Team->Cleanup command. Unfortunately, I get this error when I run the Team->Cleanup command. Are there any other options?

Why is svn locked?

The lock tells other users that the file is being edited, and you can avoid merge issues. When you set up source control, you can configure SVN to make files with certain extensions read only. Users must get a lock on these read-only files before editing.

What is svn lock?

Name. svn lock — Lock working copy paths or URLs in the repository so that no other user can commit changes to them.

I had similar problem. Team->Refresh/Cleanup Solved my problem