Assertion error when running version.train

[venkatram-dev]

While debugging #311 , stumbled upon another issue.

Steps to reproduce

From the UI, Created a new project, new version with sample dataset, created version.

Ran the training code.

workspace = rf.workspace()

project = workspace.project('test2-forest-fire-detection')

version = project.version(6)

print ('version',version)

version.train()

Getting error

Traceback (most recent call last):
  File "/Users/venkat/Documents/robo_python_trial/r_train.py", line 13, in <module>
    version.train()
  File "/Users/venkat/Documents/robo_python_trial/rvenv/lib/python3.12/site-packages/roboflow/core/version.py", line 450, in train
    assert self.model
           ^^^^^^^^^^
AssertionError