svn agent checkout fail

Hi, 

I have a few agents and all work well. However I have recently added a new agent and after the first successful build every subsequent build has failed on that agent.

I've tried cleaning the folders, restarting the services, clean-ups etc.

I've had  a variety of failure messages;

Failed to perform checkout on agent: Error during update from https://..... to C:\BuildAgent\work\c69f8efa72d8a495: svn: E200030: Table "REPOSITORY" exists already

Error during marking checkout directory dirty: java.io.IOException: Unable to move C:\BuildAgent\system\checkoutdir-revisions\c69f8efa72d8a495.xml to C:\BuildAgent\system\checkoutdir-revisions\c69f8efa72d8a495.xml.old

Failed to perform checkout on agent: Unable to update VCS revision information on agent

Failed to perform checkout on agent: svn cleanup failed: svn: E155004: Working copy 'C:\BuildAgent\work\c69f8efa72d8a495' locked

The agent logs can be downloaded from here.

Thanks, Terry