undeploy an java application from google app engine

Question

How can we un-deploy an application from GAE?
I don't want to delete the Project, instead I am trying to undeploy the app and use the same project to deploy completely different code.

Answer 1

Just deploy a new code, as a new version, then remove previous version.

You need at least one version always deployed, but if you don't have any replacement at this moment you can deploy a simple one static page project.