There is no built in way to roll back to the prior version of an application in WebSphere. For example, there is no roll back option in the WebSphere admin console, nor is there a wsadmin command that can be used to roll back. Instead, before you deploy a new version of the app, you would export the current version of the app.

1. In the left panel of the WebSphere admin console, select Applications > Application types > WebSphere enterprise applications.
2. Select the application and select Export.

Then, the exported EAR, WAR, JAR, or SAR can be used to return to the prior version of the app.