How to fix error in svn due to locking "error-folder is already under version control"

When i try to add folder to svn this gives following error

sanjeewa@sanjeewa-laptop:~/trunck/carbon/service-stubs$ svn add org.wso2.carbon.usage.meteringsummarygenerationds.stub/

svn: Working copy '.' locked

svn: run 'svn cleanup' to remove locks (type 'svn help cleanup' for details)

then tried to clean up. it also gives following error

sanjeewa@sanjeewa-laptop:~/trunck/carbon/service-stubs$ svn cleanup

svn: 'org.wso2.carbon.usage.meteringsummarygenerationds.stub' is not a working copy directory

then i removed that folder by deleting and add new folder and try to add it

sanjeewa@sanjeewa-laptop:~/trunck/carbon/service-stubs$ svn add org.wso2.carbon.usage.meteringsummarygenerationds.stub/

svn: warning: 'org.wso2.carbon.usage.meteringsummarygenerationds.stub' is already under version control

So finally i found the way to solve it
01.first copy that folder to some other location(remove all .svn files inside)
02.then type svn clenup
03.then type svn revert command
svn revert org.wso2.carbon.usage.meteringsummarygenerationds.stub/
04.Copy back that folder to the location that we need
05.then add to svn
svn add org.wso2.carbon.usage.meteringsummarygenerationds.stub/