PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 index globalplaza3_content: index not preread

Stack trace:
at /srv/www/globalplaza.hu/gothic/db/pdo.php:44
0# /srv/www/globalplaza.hu/gothic/db/pdo.php:44:  PDOStatement->execute()
1# /srv/www/globalplaza.hu/gothic/common.php:1080:  GtcPDO->smartQuery("SELECT id, ( has_content_slide_image = 1 OR has_content_boxtitle_image = 1 ) AS has_image
FROM globalplaza3_content
WHERE filter_id_category_path IN (1008) AND ts_delayed_start <= ? AND ts_delayed_end > ? AND ts_valid_start <= ? AND ts_valid_end > ? AND id <> ? AND has_image > 0 AND content_type_sql = ? AND s_highlight = ?
ORDER BY RAND()
LIMIT 3", array(7))
2# /srv/www/globalplaza.hu/gothic/common.php:1236:  GtcQueryIterator->start()
3# /srv/www/globalplaza.hu/gothic/common.php:943:  GtcUnionIterator->start()
4# /srv/www/globalplaza.hu/gothic/common.php:991:  GtcAbstractProxyIterator->start()
5# /srv/www/globalplaza.hu/gothic/common.php:1163:  GtcFilterIterator->start()
6# /srv/www/globalplaza.hu/modules/sitetool.php:579:  GtcLimitIterator->start()
7# /srv/www/globalplaza.hu/article.php:118:  htExtendWithMysqlIterator->__construct(Object(GtcLimitIterator), "SELECT c.id, c.mode, c.name,
  i1.id AS img_id, i1.img_ext, i1.res_name AS img_res_name,
  i2.id AS boxtitle_img_id, i2.img_ext AS boxtitle_img_ext, i2.res_name AS boxtitle_img_res_name,
  i2.id AS boxtitle_small_id, i2.small_ext AS boxtitle_small_ext, i2.res_name AS boxtitle_small_res_name
FROM gp3_content c
LEFT OUTER JOIN gp3_image i1 ON i1.id_a ... = NOW() OR c.ts_delayed_end IS NULL)
GROUP BY c.id", array(0))
8# /srv/www/globalplaza.hu/gothic/common.php:497:  Article->beforeRender()
9# /srv/www/globalplaza.hu/gothic/common.php:800:  Template->_render()
10# /srv/www/globalplaza.hu/ctempl/frame.jarl.php:568:  CachedFilteredTemplate->render(Object(SiteFrameTemplate))
11# /srv/www/globalplaza.hu/gothic/common.php:538:  include("/srv/www/globalplaza.hu/ctempl/frame.jarl.php")
12# /srv/www/globalplaza.hu/gothic/common.php:800:  Template->_render()
13# /srv/www/globalplaza.hu/modules/frame.php:324:  CachedFilteredTemplate->render()
14# /srv/www/globalplaza.hu/article.php:153:  SiteFrame("Article")