I am unable to deploy an application module.
appcfg.py update --oauth2 app.yaml producer.yaml
Error 409: --- begin server output ---
Another transaction by user rue1401 is already in progress for app: s~lpsng2, version: 4. That user can undo the transaction with "appcfg rollback".
--- end server output ---
Doing an
appcfg.py rollback . --oauth2 app.yaml producer.yaml
indicates no error, but does not solve the problem.
Deploying the default modules (for the same application) works.
Incrementing the version (in the .yaml files), redeploying both modules, and activating the new version finally solved the problem.