PLAN 9 FROM OUTER SPACE is a 1957 movie?

Does IMDb really want PLAN 9 FROM OUTER SPACE listed as a 1957 movie just because of a preview in 1957? For decades, it has always been considered a 1959 film on IMDb and most sites and reference books -- though I see that a few other sites (including Wikipedia and Letterboxd) are now listing it as a 1957 release, possibly taking IMDb's lead. https://www.imdb.com/title/tt0052077/releaseinfo/ https://archive.ph/314uY