[Python] Create Flask Restx endpoints without namespaces

I'm working on the redesign of an API with Flask using Flask-restx, but I've a problem: We need a legacy version of the API that accepts the old URLs, for compatibility reasons, but I'm not understanding how to do this since Flask-restx requires a namespace to be declared.

Urls should be something like this:

{{host}}/api/v1/art/savegallery <- new one
{{host}}/savegallery <- legacy


In Flask I've something like this:

app/__init__.py

db = SQLAlchemy()
migrate = Migrate()
cors = CORS()


def create_app(config_class=DevelopmentConfig):
app = Flask(__name__)
app.config.from_object(config_class)

db.init_app(app=app)
migrate.init_app(app=app, db=db)
cors.init_app(app=app)

from app.api import api_bp, legacy_bp
app.register_blueprint(api_bp, url_prefix='/api/v1')
app.register_blueprint(legacy_bp)

return app


/app/api/__init__.py

api_bp = Blueprint('v1', __name__)
legacy_bp = Blueprint('legacy', __name__)

api_v1 = Api(
app=api_bp,
version='1.00',
title='Art',
description=(
"API"
),
)

api_lgc = Api(
app=legacy_bp,
version='1.00',
title='Art Legacy',
description=(
"API Legacy"
),
)



from app.art.routes import art_ns
api_v1.add_namespace(art_ns)
api_lgc.add_namespace(art_ns)


app/art/routes.py

art_ns = Namespace(name='art', description='Art Storage')
#artlegacy_ns = Namespace(name='legacy', description='Art Storage')


@art_ns.route('/savegallery')
class GalleryAPI(Resource):
def get(self):
try:
#data = request.json
data = {}
return {"foo":"bar"}, 200
except Exception as e:
print(e)
return {"error": "Something happened"}, 500


With this, I can access {{host}}/api/v1/art/savegallery correctly, but I'm not finding a way to declare the legacy one, since creating a URL this way would require at least the namespace part of the URL. Does Flask-restx have a way to declare those URLs and/or redirect the flow to the new ones?

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