Database error: [Table 'ac_posts' is marked as crashed and should be repaired]

SELECT a.*, b.post_content FROM ac_posts a INNER JOIN ac_posts_content b ON a.ID = b.ID WHERE a.ID IN(864688,2185157,260675,453241,1487058,1745090,1751535,1756771,1757327,1757371,1877025,2648077,2742330,2837325,2837326,2837328,2837330,2837332,2837334,2846185) ORDER BY FIELD(a.ID, 864688,2185157,260675,453241,1487058,1745090,1751535,1756771,1757327,1757371,1877025,2648077,2742330,2837325,2837326,2837328,2837330,2837332,2837334,2846185);