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Type Mismatch

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Erroneous Code Example

This error occurs when the type of a value you’re providing doesn’t match the expected field type defined in your schema. For example, the field age is defined as an integer in the schema but you’re providing a string. 
QUERY addUser(someField: U32) =>
    user <- AddN<User>({someField: someField})
    RETURN user

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Solution

Either change the type of the field in the schema to U32.
    QUERY addUser(someField: U32) =>
        user <- AddN<User>({someField: someField})
        RETURN user