CLI 400 error deploying to Google App Engine

Question

Today I got a new error when trying to deploy my application to Google App Engine via the command line:

Updating module [default]...-ERROR: (gcloud.preview.app.deploy) Server responded with code [400]:
  Bad Request Unexpected HTTP status 400.
  Your app may not have more than 120 versions.
  Please delete one of the existing versions before trying to create a new version.

I am deploying to the top level using --promote, not creating other versions. How do I fix this error?

Answer 1

There is also a way to do this via command line if that interests you.

gcloud preview app versions list

gcloud preview app modules delete <module_name> --version=<version_number>

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UPDATE 2017 (see also CLI 400 error deploying to Google App Engine )

List all versions:

gcloud app versions list

Delete versions v1 and v2:

gcloud app versions delete v1 v2

https://cloud.google.com/sdk/gcloud/reference/app/versions/