diff --git a/application/core/DB_Model.php b/application/core/DB_Model.php
index 6591e7288..e0c318961 100644
--- a/application/core/DB_Model.php
+++ b/application/core/DB_Model.php
@@ -4,6 +4,8 @@ class DB_Model extends FHC_Model
 {
 	protected $dbTable;  // Name of the DB-Table for CI-Insert, -Update, ...
 	protected $pk;  // Name of the PrimaryKey for DB-Update, Load, ...
+	protected $hasSequence;	// False if this table has a composite primary key that is not using a sequence
+							// True if this table has a primary key that uses a sequence
 	protected $acl;  // Name of the PrimaryKey for DB-Update, Load, ...
 	
 	function __construct($dbTable = null, $pk = null)
@@ -11,6 +13,7 @@ class DB_Model extends FHC_Model
 		parent::__construct();
 		$this->dbTable = $dbTable;
 		$this->pk = $pk;
+		$this->hasSequence = true;
 		$this->load->database();
 		$this->acl = $this->config->item('fhc_acl');
 	}
@@ -34,19 +37,27 @@ class DB_Model extends FHC_Model
 		// DB-INSERT
 		if ($this->db->insert($this->dbTable, $data))
 		{
+			// If the table has a primary key that uses a sequence
+			if ($this->hasSequence === true)
+			{
+				return $this->_success($this->db->insert_id());
+			}
 			// Avoid to use method insert_id() from CI because it forces to have a sequence
 			// and doesn't return the primary key when it's composed by more columns
-			$primaryKeysArray = array();
-			
-			foreach ($this->pk as $key => $value)
+			else
 			{
-				if(isset($data[$value]))
+				$primaryKeysArray = array();
+
+				foreach ($this->pk as $key => $value)
 				{
-					$primaryKeysArray[$value] = $data[$value];
+					if (isset($data[$value]))
+					{
+						$primaryKeysArray[$value] = $data[$value];
+					}
 				}
+
+				return $this->_success($primaryKeysArray);
 			}
-			
-			return $this->_success($primaryKeysArray);
 		}
 		else
 			return $this->_error($this->db->error(), FHC_DB_ERROR);
diff --git a/application/models/crm/Prestudentstatus_model.php b/application/models/crm/Prestudentstatus_model.php
index dbc6f3abe..8f6b57a41 100644
--- a/application/models/crm/Prestudentstatus_model.php
+++ b/application/models/crm/Prestudentstatus_model.php
@@ -1,7 +1,7 @@
 <?php
+
 class Prestudentstatus_model extends DB_Model
 {
-
 	/**
 	 * Constructor
 	 */
@@ -10,5 +10,6 @@ class Prestudentstatus_model extends DB_Model
 		parent::__construct();
 		$this->dbTable = 'public.tbl_prestudentstatus';
 		$this->pk = array('ausbildungssemester', 'studiensemester_kurzbz', 'status_kurzbz', 'prestudent_id');
+		$this->hasSequence = false;
 	}
-}
+}
\ No newline at end of file