message: Fix entityKey warning condition
diff: @@ -261,8 +261,7 @@ const writeField = (
  if (
  typeof data.__typename !== 'string' ||
  - ctx.store.keys[data.__typename] !== undefined ||
  - entityKey !== null
  + (ctx.store.keys[data.__typename] === undefined && entityKey === null)
  ) {
  warning(
  false,
  