When i try to connect to slave on Jenkins Master i'm getting the following strange error.

[2017-02-10 10:51:19] [windows-slaves] Connecting to jenkins-slavewindows1.xxxx
ERROR: A duplicate name exists on the network.
jcifs.smb.SmbException: A duplicate name exists on the network.
at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java:563)
at jcifs.smb.SmbTransport.send(SmbTransport.java:664)
at jcifs.smb.SmbSession.send(SmbSession.java:238)
at jcifs.smb.SmbTree.treeConnect(SmbTree.java:176)
at jcifs.smb.SmbFile.doConnect(SmbFile.java:911)
at jcifs.smb.SmbFile.connect(SmbFile.java:954)
at jcifs.smb.SmbFile.connect0(SmbFile.java:880)
at jcifs.smb.SmbFile.queryPath(SmbFile.java:1335)
at jcifs.smb.SmbFile.exists(SmbFile.java:1417)
at hudson.os.windows.ManagedWindowsServiceLauncher.launch(ManagedWindowsServiceLauncher.java:219)
at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:261)
at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

We only have this windows slave and the name is unique, so i don't understand why this is happening.