Let’s use yours instead

SELECT * FROM gallery2 WHERE topic_id="1399009" UNION SELECT * FROM gallery2 WHERE topic_id="59504" UNION SELECT * FROM gallery2 WHERE topic_id="1591054" UNION SELECT * FROM gallery2 WHERE topic_id="548932" UNION SELECT * FROM gallery2 WHERE topic_id="363329" UNION SELECT * FROM gallery2 WHERE topic_id="1402386" UNION SELECT * FROM gallery2 WHERE topic_id="1245801" UNION SELECT * FROM gallery2 WHERE topic_id="366868" UNION SELECT * FROM gallery2 WHERE topic_id="376937" UNION SELECT * FROM gallery2 WHERE topic_id="1603120" UNION SELECT * FROM gallery2 WHERE topic_id="1076177" UNION SELECT * FROM gallery2 WHERE topic_id="1787140" UNION SELECT * FROM gallery2 WHERE topic_id="768813" UNION SELECT * FROM gallery2 WHERE topic_id="1108885" UNION SELECT * FROM gallery2 WHERE topic_id="1235191" UNION SELECT * FROM gallery2 WHERE topic_id="1139123"