A Database Error Occurred

Error Number: 1191

Can't find FULLTEXT index matching the column list

(SELECT *,MATCH(title,tag) AGAINST('tujhe kitna chahne lage ce729b694bceab5bd0a56c0d9b40e7f6 73kw love')+1 as score FROM `full_screen_videostatus` where id <> 18211 AND status='show' AND action='approved' AND language like '%hindi%')UNION(SELECT *,MATCH(title,tag) AGAINST('tujhe kitna chahne lage ce729b694bceab5bd0a56c0d9b40e7f6 73kw love')+1 as score FROM `video_status` where status='show' AND action='approved' AND language like '%hindi%')ORDER BY score DESC LIMIT 0,20

Filename: models/Video_view_m.php

Line Number: 45