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Users using federation 1.0 composition and `@specifiedBy` directives would get an error saying `Unknown directive "@specifiedBy".`.
This was due to a misconfiguration in federation 1.0 validation logic which used graphql-js 15.0.0 to validate the generated supergraph core schema rather than using graphql-js 15.7.2.
This bug was introduced at 18:20 UTC May 23, and a fix was released at 08:53 UTC May 24.
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