How to enable api-key auth for all version when deploying multiple versions to same configuration in Google Clould Endpoint - google-app-engine

Question

I deployed 2 versions of openapi.yaml file to Google Cloud Endpoint using the Cloud Endpoint's versioning feature(i.e gcloud service-management deploy openapi_v1.yaml openapi_v2.yaml). Each version of the yaml file contains a version number and basepath different from the other, one endpoint that use api-key authentication, and definition for api-key authentication tag. After deployed to Endpoint, the configuration shows both yaml file, however deploying an api to GAE using this configuration will only have api-key authentication turned on for the newer version.
Does anyone know if this is a known bug, or there is something else I need to do to enable authentication for all versions?
The .yaml file looks like the following. The two versions I used to test on are identical except version and bathpath:
swagger: "2.0"
info:
description: "This API is used to connect 3rd-party ids to a common user identity"
version: "0.0.1"
title: "****"
host: "uie-dot-user-id-exchange.appspot.com"
basePath: "/v0"
...
- "https"
x-google-allow: all
paths:
...
/ids/search:
get:
operationId: "id_search"
produces:
- "application/json"
security:
- api_key: []
tags:
- "Ids"
summary: "Privileged endpoint. Provide any id (3rd party or otherwise) and get a hash of all ids associated with it."
parameters:
- in: "query"
name: "id_type"
description: "Type of id to search"
required: true
type: string
- in: "query"
name: "id_value"
description: "Value of id to search"
required: true
type: string
responses:
200:
description: "AssociatedIdsHash"
schema:
$ref: '#/definitions/AssociatedIdsHash'
400:
description: "Bad request. Requires both id_type and id_value query parameters."
401:
description: "Unauthorized. Please provide a valid api-key in the \"api-key\" header."
404:
description: "Not found - no entry found for key provided"
...
################ SECURITY DEFINITIONS ################
securityDefinitions:
# This section configures basic authentication with an API key.
api_key:
type: "apiKey"
name: "key"
in: "query"

Answer 1

I can replicate this issue and it appears to be a bug.
What does work is adding the API key restriction on the global level for both versions rather than at the per-path level. Perhaps this workaround will suffice for your use case.
...
security:
- api_key: []
path:
...