Transaction would exhaust block limits Error when calling flipper contract

[minhnd-dev]

I deployed the flipper contract in a local node. I tried to call the flip() method but I got this error:

Traceback (most recent call last):
  File "shibuya_interface.py", line 34, in <module>
    contract_receipt = contract.exec(keypair, 'flip', args={}, gas_limit=5*1000000000000)
  File "/home/minhnd/anaconda3/lib/python3.8/site-packages/substrateinterface/contracts.py", line 884, in exec
    receipt = self.substrate.submit_extrinsic(extrinsic, wait_for_inclusion=True)
  File "/home/minhnd/anaconda3/lib/python3.8/site-packages/substrateinterface/base.py", line 1823, in submit_extrinsic
    response = self.rpc_request(
  File "/home/minhnd/anaconda3/lib/python3.8/site-packages/substrateinterface/base.py", line 575, in rpc_request
    raise SubstrateRequestException(message['error'])
substrateinterface.exceptions.SubstrateRequestException: {'code': 1010, 'message': 'Invalid Transaction', 'data': 'Transaction would exhaust the block limits'}

This is the code I used to call the flipper contract:

from substrateinterface import Keypair
from pprint import pprint

substrate = SubstrateInterface(
    url="ws://127.0.0.1:9944",
    ss58_format=42,
    type_registry_preset='substrate-node-template'
)

contract = ContractInstance.create_from_address(
    contract_address="5FLDbYpNbP3SLQPDsXUvY5tMkf67NaqChiFJLzUiNZAnAJgh",
    metadata_file="./flipper_metadata.json",
    substrate=substrate
)

keypair = Keypair.create_from_uri('//Alice')

contract_receipt = contract.exec(keypair, 'flip', args={}, gas_limit=5*1000000000000)

if contract_receipt.is_success:
    print(f'Events triggered in contract: {contract_receipt.contract_events}')
else:
    print(f'Call failed: {contract_receipt.error_message}')