diff -r 6105ee2cceaf -r 947d0f6a6a83 src/main/java/de/uapcore/lightpit/dao/postgres/PGVersionDao.java
--- a/src/main/java/de/uapcore/lightpit/dao/postgres/PGVersionDao.java	Thu Oct 15 12:27:05 2020 +0200
+++ b/src/main/java/de/uapcore/lightpit/dao/postgres/PGVersionDao.java	Thu Oct 15 13:31:52 2020 +0200
@@ -47,16 +47,14 @@
 
     public PGVersionDao(Connection connection) throws SQLException {
         list = connection.prepareStatement(
-                "select versionid, project, p.name as projectname, v.name, ordinal, status " +
-                        "from lpit_version v " +
-                        "join lpit_project p on v.project = p.projectid " +
+                "select versionid, project, name, ordinal, status " +
+                        "from lpit_version " +
                         "where project = ? " +
-                        "order by ordinal desc, lower(v.name) desc");
+                        "order by ordinal desc, lower(name) desc");
 
         find = connection.prepareStatement(
-                "select versionid, project, p.name as projectname, v.name, ordinal, status " +
-                        "from lpit_version  v " +
-                        "join lpit_project p on v.project = p.projectid " +
+                "select versionid, project, name, ordinal, status " +
+                        "from lpit_version  " +
                         "where versionid = ?");
 
         insert = connection.prepareStatement(
@@ -68,10 +66,7 @@
     }
 
     private Version mapColumns(ResultSet result) throws SQLException {
-        final var project = new Project(result.getInt("project"));
-        project.setName(result.getString("projectname"));
         final var version = new Version(result.getInt("versionid"));
-        version.setProject(project);
         version.setName(result.getString("name"));
         version.setOrdinal(result.getInt("ordinal"));
         version.setStatus(VersionStatus.valueOf(result.getString("status")));
@@ -79,10 +74,9 @@
     }
 
     @Override
-    public void save(Version instance) throws SQLException {
+    public void save(Version instance, Project project) throws SQLException {
         Objects.requireNonNull(instance.getName());
-        Objects.requireNonNull(instance.getProject());
-        insert.setInt(1, instance.getProject().getId());
+        insert.setInt(1, project.getId());
         insert.setString(2, instance.getName());
         insert.setInt(3, instance.getOrdinal());
         insert.setString(4, instance.getStatus().name());
@@ -106,9 +100,7 @@
         List<Version> versions = new ArrayList<>();
         try (var result = list.executeQuery()) {
             while (result.next()) {
-                final var v = mapColumns(result);
-                v.setProject(project);
-                versions.add(v);
+                versions.add(mapColumns(result));
             }
         }
         return versions;