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GraphQL–The query has non-mergable fields

I constructed the following query in GraphQL playground:

In this query I try combine 2 calls, one to fetch a product by id and another one where I try to fetch a product by name.

However when I tried to execute this query it resulted in the following error message:

The query has non-mergable fields

The problem is that GraphQL tries to merge the results in one product result object which does not work.

To have the behavior I want I need to specify an alias for every query:

Now when I execute the query, the query results are put in their own object:

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