how to update model version on model registry

[lingshu]

Hi, currently I'm working on vertex ai pipelines. I'm confused on how to update my model version on model registry.

Versions:

kfp                                    2.0.0rc1
kfp-pipeline-spec                      0.2.2
kfp-server-api                         2.0.0rc1
google_cloud_pipeline_components       2.0.0b

Here's the code snippet:

models = aiplatform.Model.list(filter=(“display_name={}“).format(MODEL_DISPLAY_NAME))
parent_model = models[0].resource_name
model_upload_op = ModelUploadOp(
project=PROJECT_ID,
display_name=MODEL_DISPLAY_NAME,
parent_model=,
unmanaged_container_model=unmanaged_model_importer.outputs[“artifact”],
).after(unmanaged_model_importer)

Error message:

InconsistentTypeException: Incompatible argument passed to the input 'parent_model' of component 'model-upload':
Argument type 'STRING' is incompatible with the input type 'google.VertexModel@0.0.1'

Is there any way to resolve this? 
Thank you.