Cannot create a budget proposal that overlaps with an pending budget proposal or an approved budget?

[蓝瀚]

I'm tring to create a new account budget for a google-ads account  followed google-ads-api's guide 

from __future__ import absolute_import

import argparse
import sys
import os
import six

import google.ads.google_ads.client


os.environ['https_proxy'] = 'https_proxy'

GG_DEVELOP_TOKEN = "GG_DEVELOP_TOKEN"


credentials_dict_lb = {"token_uri": "https://oauth2.googleapis.com/token", "token": None, "scopes": ["https://www.googleapis.com/auth/adwords",

 "https://www.googleapis.com/auth/userinfo.profile", "https://www.googleapis.com/auth/userinfo.email", "openid"],

 "client_id": "client_id", 

"refresh_token": "refresh_token", "client_secret": "client_secret"}



def main(client, customer_id, billing_setup_id):
    account_budget_proposal_service = client.get_service(
        'AccountBudgetProposalService')
    billing_setup_service = client.get_service('BillingSetupService',
                                               version='v2')


    account_budget_proposal_operation = client.get_type(
        'AccountBudgetProposalOperation')
    proposal = account_budget_proposal_operation.create

    proposal.proposal_type = client.get_type(
        'AccountBudgetProposalTypeEnum').CREATE
    proposal.billing_setup.value = billing_setup_service.billing_setup_path(
        customer_id, billing_setup_id)
    proposal.proposed_name.value = 'Account Budget Proposal (example)'

    # Specify the account budget starts immediately
    proposal.proposed_start_time_type = client.get_type('TimeTypeEnum',
                                                        version='v2').NOW
    # Alternatively you can specify a specific start time. Refer to the
    # AccountBudgetProposal resource documentation for allowed formats.
    #
    # proposal.proposed_start_date_time = '2020-01-02 03:04:05'

    # Specify that the budget runs forever
    proposal.proposed_end_time_type = client.get_type('TimeTypeEnum',
                                                      version='v2').FOREVER
    # Alternatively you can specify a specific end time. Allowed formats are as
    # above.
    #
    # proposal.proposed_end_date_time = '2021-01-02 03:04:05'

    # Optional: set notes for the budget. These are free text and do not effect
    # budget delivery.
    #
    # proposal.proposed_notes = client.wrapper
    #     .string('Received prepayment of $0.01')
    proposal.proposed_spending_limit_micros.value = 0

    try:
        account_budget_proposal_response = (
          account_budget_proposal_service.mutate_account_budget_proposal(
              customer_id, account_budget_proposal_operation))

    except google.ads.google_ads.errors.GoogleAdsException as ex:
        print('Request with ID "%s" failed with status "%s" and includes the '
              'following errors:' % (ex.request_id, ex.error.code().name))
        for error in ex.failure.errors:
            print('\tError with message "%s".' % error.message)
            if error.location:
                for field_path_element in error.location.field_path_elements:
                    print('\t\tOn field: %s' % field_path_element.field_name)
        sys.exit(1)

    print('Created account budget proposal "%s".'
          % account_budget_proposal_response.result.resource_name)


if __name__ == '__main__':
    # GoogleAdsClient will read the google-ads.yaml configuration file in the
    # home directory if none is specified.
    credentials = google.oauth2.credentials.Credentials(**credentials_dict_lb)
    client = google.ads.google_ads.client.GoogleAdsClient(credentials, GG_DEVELOP_TOKEN, login_customer_id='1871151278')


    parser = argparse.ArgumentParser(
        description='Creates an account budget proposal.')
    # The following argument(s) should be provided to run the example.
    parser.add_argument('-c', '--customer_id', type=six.text_type,
                        required=True, help='The Ads customer ID.')
    parser.add_argument('-b', '--billing_setup_id', type=six.text_type,
                        required=True, help='The billing setup ID.')
    args = parser.parse_args()

    main(client, args.customer_id, args.billing_setup_id)

but got error like below:

Request made: ClientCustomerId: 1135645950, Host: googleads.googleapis.com:443, Method: /google.ads.googleads.v2.services.AccountBudgetProposalService/MutateAccountBudgetProposal, RequestId: 7l0JJ7hBfVkKhAGlQjSSgQ, IsFault: True, FaultMessage: Cannot create a budget proposal that overlaps with an pending budget proposal or an approved budget.
Request with ID "7l0JJ7hBfVkKhAGlQjSSgQ" failed with status "INVALID_ARGUMENT" and includes the following errors:
        Error with message "Cannot create a budget proposal that overlaps with an pending budget proposal or an approved budget.".
                On field: operation

My biling setup as :

Billing setup with ID "billing_setup_id ", status "APPROVED", payments_account "customers/1135645950/paymentsAccounts/payments_account_id", payments_account_id "payments_account_id", payments_account_name "Bluefocus蓝瀚", payments_profile_id "payments_profile_id", payments_profile_name "BlueFocus International Limited", secondary_payments_profile_id "".

My account budget as :

Account budget "customers/1135645950/accountBudgets/account_budget_id ", with status "APPROVED", billing setup "customers/1135645950/billingSetups/billing_setup_id", amount served 0.00, total adjustments 0.00, approved spending limit "1.0" (proposed "1.0"), approved start time "value: "2019-09-12 18:46:53"
 " (proposed "value: "2019-09-12 18:46:47"
 "), approved end time "" (proposed "").

Why I cann't create a new account budget with exist billing setup above?