One of your pages includes a large amount of page data (>= 128kB). This can negatively impact performance since page data must be parsed by the client before the page is hydrated.
Reduce the amount of data returned from getStaticProps, getServerSideProps, or getInitialProps to only the essential data to render the page. The default threshold of 128kB can be configured in largePageDataBytes if absolutely necessary and the performance implications are understood.