An Error Was Encountered

Error Number: 1195

Table 'ma' is marked as crashed and last (automatic?) repair failed

select SQL_CALC_FOUND_ROWS * from medi_keywords mk , medi_keyword_articles mka, medi_articles ma where ma.article_id = mka.article_id and ma.article_content!='' and ma.article_caption!='' and mk.keyword_id = mka.keyword_id and mk.category_id = '63' limit 0,50