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raise ValueError(f"No '{name}' annotation")

I think the gazebo_ros spawn_entity.py wants a name. You have a name in there, which you commented out. It uses -entity to request a name.

However, you have it in there twice. first as "-entity", -f"AGV_CAR" which I am not quite sure how to interpret that.

And second

    # arguments=['-entity',
    #        'mobot',

Which would spawn a robot called mobot.

I'm not sure why you commented those lines out? I don't think spawn_entity uses -file anymore. It used to be possible to use -file to give the URDF file, but it has switched to using a topic (for instance robot_description as you have used, but you might want to remove the /).

I hope this helps, otherwise drop a comment.