OcurriĆ³ un Error con la Base de Datos

Error Number: 1191

Can't find FULLTEXT index matching the column list

SELECT id,tabla,tabla,contenido,titulo, MATCH(tabla,contenido,titulo) AGAINST('*jax_guestbook.php&sa=U&ved=0ahUKEwjckp6r3f_hAhXLr1QKHeW2BFkQFgg9MAg&usg=AOvVaw0o8vaoIlyF7b1qjj240SCF*' IN BOOLEAN MODE) AS relevancia FROM contenidos WHERE MATCH(tabla,contenido,titulo) AGAINST('*jax_guestbook.php&sa=U&ved=0ahUKEwjckp6r3f_hAhXLr1QKHeW2BFkQFgg9MAg&usg=AOvVaw0o8vaoIlyF7b1qjj240SCF*' IN BOOLEAN MODE)

Filename: /homepages/17/d411370337/htdocs/WEBS/triphasik/models/buscar_model.php

Line Number: 63