So below is the code that I am using. I want to use the productName to get the values from productNameReplicas

  replicas: {{ index .Values.productNameReplicas .Values.productName | default 1 }}

Here is my values file

productNameReplicas:
  carAi: 3
  langAI: 3

The problem is if the productName is not in productNameReplicas, it doesnt just use the default value and give me the error:

 error calling index: index of untyped nil

Any ideas to get something like this working?