NameError: name 'class_id' is not defined. Did you mean: 'class_ids'?

[Nikitaa15]

"C:\Users\Adimax Infoways\PycharmProjects\pythonProject\venv\Scripts\python.exe" "C:\Users\Adimax Infoways\PycharmProjects\pythonProject\main.py"
Traceback (most recent call last):
File "C:\Users\Adimax Infoways\PycharmProjects\pythonProject\main.py", line 27, in
confidence = scores[class_id]
^^^^^^^^
NameError: name 'class_id' is not defined. Did you mean: 'class_ids'?

I found this error in this code. What it means? and How can I fix it?