Fails to upgrade to 1.476 with the following error. The update site does not have 1.476 version available.

jenkins.war
Failure -
hudson.util.IOException2: Failed to download from http://updates.jenkins-ci.org/download/war/1.476/jenkins.war
at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:668)
at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:1008)
at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:987)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: http://ftp-nyc.osuosl.org/pub/jenkins/war/1.476/jenkins.war
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:638)
... 8 more
Caused by: java.io.FileNotFoundException: http://ftp-nyc.osuosl.org/pub/jenkins/war/1.476/jenkins.war
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source)
at java.net.URLConnection.getHeaderFieldInt(Unknown Source)
at java.net.URLConnection.getContentLength(Unknown Source)
at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:637)
... 8 more