This page does not detail correct step by step or 'gotchas'

**Describe the content issue**:
A clear and concise description of what the content issue is. Is there content missing or is there incorrect content?

**URL page where content issue is**:

https://docs.amplify.aws/cli/migration/override/

some items to add to this doc:

policies to consider, have some customers seeing s3 bucket errors trying to do this. Why? What are policy consideration to be taken into account when performing this? These should be added to this page