Google experienced some indexing issues which led to a few users seeing old links on Search results.
Google didn't reveal the cause of the issue but it has been resolved.
Notably, Google had faced similar indexing issues twice in April, once for Search and the other time for News.
About Google
Founded: September 4, 1998
Founders: Larry Page, Sergey Brin
Sundar Pichai: CEO
Ruth Porat: CFO