Creating a flow from a deployment using prefect client is failing due to an extra input field "labels"

[jiohyoo]

Bug summary

Starting from prefect version 3.1.11, the creating a flow run from a deployment fails with the following error.

main $ pip freeze | grep prefect
prefect==3.1.11
prefect-ray==0.4.3

main $ prefect deployment run 'retry-flow/retry_flow'
Creating flow run for deployment 'retry-flow/retry_flow'...
Traceback (most recent call last):
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/cli/_utilities.py", line 43, in wrapper
    return fn(*args, **kwargs)
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/cli/_types.py", line 155, in sync_fn
    return asyncio.run(async_fn(*args, **kwargs))
  File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/usr/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/cli/deployment.py", line 857, in run
    flow_run = await client.create_flow_run_from_deployment(
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/client/orchestration/__init__.py", line 681, in create_flow_run_from_deployment
    response = await self._client.post(
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/httpx/_client.py", line 1859, in post
    return await self.request(
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/httpx/_client.py", line 1540, in request
    return await self.send(request, auth=auth, follow_redirects=follow_redirects)
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/client/base.py", line 355, in send
    response.raise_for_status()
  File "/home/ubuntu/prefect-poc/.venv/lib/python3.10/site-packages/prefect/client/base.py", line 163, in raise_for_status
    raise PrefectHTTPStatusError.from_httpx_error(exc) from exc.__cause__
prefect.exceptions.PrefectHTTPStatusError: Client error '422 Unprocessable Entity' for url 'http://127.0.0.1:4200/api/deployments/9c692ce5-0945-490a-9f05-5101511c8152/create_flow_run'
Response: {'exception_message': 'Invalid request received.', 'exception_detail': [{'type': 'extra_forbidden', 'loc': ['body', 'labels'], 'msg': 'Extra inputs are not permitted', 'input': {}}], 'request_body': {'state': {'type': 'SCHEDULED', 'name': 'Scheduled', 'message': None, 'state_details': {'scheduled_time': '2025-01-10T00:21:18.168599Z', 'traceparent': None}, 'data': None}, 'name': None, 'parameters': {}, 'context': {}, 'tags': [], 'idempotency_key': None, 'parent_task_run_id': None, 'job_variables': {}, 'labels': {}}}
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/422
An exception occurred.

Even though the labels is not provided in creating object DeploymentFlowRunCreate, the labels is initialized with {} and this is not accepted in the server since:

    labels: KeyValueLabelsField = Field(default_factory=dict)

https://github.com/PrefectHQ/prefect/blob/main/src/prefect/client/schemas/actions.py#L400

Version info

Version:             3.1.11
API version:         0.8.4
Python version:      3.10.14
Git commit:          e448bd34
Built:               Thu, Jan 2, 2025 1:11 PM
OS/Arch:             linux/x86_64
Profile:             ephemeral
Server type:         server
Pydantic version:    2.10.4
Integrations:
  prefect-ray:       0.4.3

Additional context

No response