IncompatibleDefinition
class IncompatibleDefinition(name: String, expectedDefinition: String, val sourceLocation: SourceLocation?) : GraphQLValidationIssue
The provided schema contains a definition that doesn't match the GraphQL specification.
This may happen in particular for directive that are in the process of being specified like @defer (as of Jul 2025).
Because the Apollo compiler expects a certain shape of directive and arguments, anything else may trigger a crash in the compiler. By validating explicitly, the error is more explicit.