Not sure what I’m missing

SELECT * FROM gallery2 WHERE topic_id="628042" UNION SELECT * FROM gallery2 WHERE topic_id="1428426" UNION SELECT * FROM gallery2 WHERE topic_id="1162446" UNION SELECT * FROM gallery2 WHERE topic_id="1066949" UNION SELECT * FROM gallery2 WHERE topic_id="1722980" UNION SELECT * FROM gallery2 WHERE topic_id="17928" UNION SELECT * FROM gallery2 WHERE topic_id="1674144" UNION SELECT * FROM gallery2 WHERE topic_id="86253" UNION SELECT * FROM gallery2 WHERE topic_id="580363" UNION SELECT * FROM gallery2 WHERE topic_id="135245" UNION SELECT * FROM gallery2 WHERE topic_id="1814753" UNION SELECT * FROM gallery2 WHERE topic_id="744412" UNION SELECT * FROM gallery2 WHERE topic_id="327765" UNION SELECT * FROM gallery2 WHERE topic_id="1700309" UNION SELECT * FROM gallery2 WHERE topic_id="750661" UNION SELECT * FROM gallery2 WHERE topic_id="1601860"