svn mismatch

用過svn 1.6的work_copy，
整份copy拿到svn 1.4或是svn 1.5上，
會有work_copy上的問題，
解法請看下面的link


延伸閱讀：
I got an error saying "This client is too old to work with working copy '...' ". How can I fix it without upgrading Subversion?