To uninstall P6 EPPM Web Services from a WebSphere server:
Do one of the following:
On Windows platforms, from the Start menu, choose Programs, app name, Uninstall app name.
On Unix platforms, change to the installableApps/app name directory under the WebSphere install directory and run the uninstallws.sh script.
Launch the WebSphere Application Console.
Remove the current P6 EPPM Web Services deployment.
If you will use the same wshome directory for the new deployment, delete the existing EAR file from that directory to avoid conflict with the new p6ws.ear file.