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Description
I think it is built in assumption that if you give an ID of subgraph you will get result back. But in the case where we cannot find that ID it just throws.
So we can either consider making index-node API that field be non-null or we have union of responses where we can define the error message of NotFound https://blog.logrocket.com/handling-graphql-errors-like-a-champ-with-unions-and-interfaces/
