Error Message: Unable to update app: Error posting to URL :
http://appengine.google.com/api/appversion/
create?app_id=deporterversion=1 409 conflict Another transaction for
this user is already in progress for this app and major version. That
user can undo the transaction with appcfg’s “rollback” command. Fix: In Powershell run (replacing the path with the correct project path): cd \users\usr\workspace\project1 \opt\eclipse\plugins\com.google.appengine.eclipse.sdkbundle.1.3.5_1.3.5.v201006301254\appengine-java-sdk-1.3.5\bin\appcfg rollback war |