diff --git a/src/main/java/DNPM/services/DefaultStudienService.java b/src/main/java/DNPM/services/DefaultStudienService.java
index 9f2ca05..99af071 100644
--- a/src/main/java/DNPM/services/DefaultStudienService.java
+++ b/src/main/java/DNPM/services/DefaultStudienService.java
@@ -20,8 +20,8 @@ public class DefaultStudienService implements StudienService {
         var sql = "SELECT property_catalogue_version.version_number, studie.studien_nummer, pcve.code, pcve.shortdesc, pcve.description FROM property_catalogue "
         + "JOIN property_catalogue_version ON property_catalogue.id = property_catalogue_version.datacatalog_id "
         + "JOIN property_catalogue_version_entry pcve ON property_catalogue_version.id = pcve.property_version_id "
-        + "LEFT JOIN studie ON pcve.id = studie.property_version_entry "
-        + "WHERE property_catalogue.name = 'OS.Studien' AND s.aktiv;";
+        + "LEFT JOIN studie ON pcve.id = studie.property_version_entry AND studie.aktiv "
+        + "WHERE property_catalogue.name = 'OS.Studien';";
 
         return this.jdbcTemplate.query(sql, (resultSet, i) -> new Studie(
                 resultSet.getString(1),
@@ -37,8 +37,8 @@ public class DefaultStudienService implements StudienService {
         var sql = "SELECT property_catalogue_version.version_number, studie.studien_nummer, pcve.code, pcve.shortdesc, pcve.description FROM property_catalogue "
                 + "JOIN property_catalogue_version ON property_catalogue.id = property_catalogue_version.datacatalog_id "
                 + "JOIN property_catalogue_version_entry pcve ON property_catalogue_version.id = pcve.property_version_id "
-                + "LEFT JOIN studie ON pcve.id = studie.property_version_entry "
-                + "WHERE property_catalogue.name = 'OS.Studien' AND studie.aktiv AND (pcve.shortdesc LIKE ? OR pcve.description LIKE ?);";
+                + "LEFT JOIN studie ON pcve.id = studie.property_version_entry AND studie.aktiv "
+                + "WHERE property_catalogue.name = 'OS.Studien' AND (pcve.shortdesc LIKE ? OR pcve.description LIKE ?);";
 
         var like = String.format("%%%s%%", query);