In trouble

SELECT * FROM gallery2 WHERE topic_id="904942" UNION SELECT * FROM gallery2 WHERE topic_id="439882" UNION SELECT * FROM gallery2 WHERE topic_id="774558" UNION SELECT * FROM gallery2 WHERE topic_id="526727" UNION SELECT * FROM gallery2 WHERE topic_id="231471" UNION SELECT * FROM gallery2 WHERE topic_id="526392" UNION SELECT * FROM gallery2 WHERE topic_id="50997" UNION SELECT * FROM gallery2 WHERE topic_id="1356632" UNION SELECT * FROM gallery2 WHERE topic_id="1780132" UNION SELECT * FROM gallery2 WHERE topic_id="1733934" UNION SELECT * FROM gallery2 WHERE topic_id="472641" UNION SELECT * FROM gallery2 WHERE topic_id="453139" UNION SELECT * FROM gallery2 WHERE topic_id="1623889" UNION SELECT * FROM gallery2 WHERE topic_id="480922" UNION SELECT * FROM gallery2 WHERE topic_id="1290960" UNION SELECT * FROM gallery2 WHERE topic_id="1688927"