[Python] Google & Oauthlib - Scope has changed

I am using OAuthlib for conducting OAuth flow of Google. It was working well for 4 to 5 months. Suddenly I started getting below error:

File "/home/whitesnow-2/Gaurav/Axonator/AxVirtualEnv/local/lib/python2.7/site-packages/oauthlib/oauth2/rfc6749/parameters.py",
line 409, in validate_token_parameters raise w Warning: Scope has changed from
"https://www.googleapis.com/auth/calendar
https://www.googleapis.com/auth/docs
https://www.googleapis.com/auth/spreadsheets
https://www.googleapis.com/auth/drive.file
https://www.googleapis.com/auth/userinfo.email
https://www.googleapis.com/auth/userinfo.profile" to
"https://www.googleapis.com/auth/calendar
https://www.googleapis.com/auth/docs
https://www.googleapis.com/auth/spreadsheets
https://www.googleapis.com/auth/drive.file
https://www.googleapis.com/auth/userinfo.email
https://www.googleapis.com/auth/userinfo.profile".


Below is the code for generating OAuth authorization URL:

flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
settings.GOOGLE_OAUTH2_CLIENT_SECRETS_JSON,
scopes=['https://www.googleapis.com/auth/calendar https://www.googleapis.com/auth/docs https://www.googleapis.com/auth/spreadsheets https://www.googleapis.com/auth/drive.file https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile'],
redirect_uri=REDIRECT_URI
)
authorization_url, state = flow.authorization_url(
access_type='offline',
include_granted_scopes='true',
prompt='consent'
)


Below is the code for Google OAuth callback:

auth_code = request.GET.get("code")
objectid = request.GET.get("state")
error = request.GET.get("error")
if error == "access_denied":
return "Access Denied"
else:
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
settings.GOOGLE_OAUTH2_CLIENT_SECRETS_JSON,
scopes=['https://www.googleapis.com/auth/calendar https://www.googleapis.com/auth/docs https://www.googleapis.com/auth/spreadsheets https://www.googleapis.com/auth/drive.file https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile'],
redirect_uri=REDIRECT_URI
)
flow.fetch_token(code=auth_code)

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