Error: Predicate name is not indexed

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eq query requires indexing on the predicate which you want to query on. From the docs:

Index Required: An index is required for the eq(predicate, ...) forms (see table below) when used at query root. For count(predicate) at the query root, the @count index is required.

Try adding following to your schema file
<name>: string @index(exact) . .