A page and its talk page have the wrong title in the page table.
SELECT page_id, page_namespace, page_title FROM enwiki_p.page where page_id IN (50274778,1272531,976991,50274777) ORDER by page_namespace;
Page ids 976991 and 1272531 should have page title Orchard_Road instead of Orchard,_Singapore.
There was a page move on April 22, 2016.
Evidently the labs replica page table does not have the unique index that production has:
CREATE UNIQUE INDEX /*i*/name_title ON /*_*/page (page_namespace,page_title);
I don't think that this will be fixed by T126946 because the page table was reimported before April 1, 2016.