@@ -1631,7 +1631,7 @@ class Database
if ($linkage) {
foreach ($linkage as $k => $v) {
- if ($v) {
+ if ($v && $v != -1) {
unset($search[$k]);
$k = str_replace('search_linkage_', '', $k);
if (isset($config['struct'][$k]['search_col'])) {