diff --git a/modules/itop-change-mgmt-1.0.0/model.itop-change-mgmt.php b/modules/itop-change-mgmt-1.0.0/model.itop-change-mgmt.php
index 244c00b2f..6ec59e0dc 100644
--- a/modules/itop-change-mgmt-1.0.0/model.itop-change-mgmt.php
+++ b/modules/itop-change-mgmt-1.0.0/model.itop-change-mgmt.php
@@ -118,7 +118,7 @@ abstract class Change extends Ticket
 					'workgroup_id' => OPT_ATT_MANDATORY,
 					'supervisor_group_id' => OPT_ATT_MANDATORY,
 					'manager_group_id' => OPT_ATT_MANDATORY,
-					'description' => OPT_ATT_READONLY,
+					'description' => OPT_ATT_READONLY,
 					'requestor_id' => OPT_ATT_READONLY,
 					'title' => OPT_ATT_MANDATORY,
 				),
@@ -141,7 +141,7 @@ abstract class Change extends Ticket
 					'agent_id' => OPT_ATT_MUSTCHANGE,
 					'supervisor_id' => OPT_ATT_MUSTCHANGE,
 					'manager_id' => OPT_ATT_MUSTCHANGE,
-					'description' => OPT_ATT_READONLY,
+					'description' => OPT_ATT_READONLY,
 					'requestor_id' => OPT_ATT_READONLY,
 				),
 			)
@@ -288,14 +288,18 @@ abstract class Change extends Ticket
 
 	public function ComputeValues()
 	{
-		$iKey = $this->GetKey();
-		if ($iKey < 0)
+		$sCurrRef = $this->Get('ref');
+		if (strlen($sCurrRef) == 0)
 		{
-			// Object not yet in the Database
-			$iKey = MetaModel::GetNextKey(get_class($this));
+			$iKey = $this->GetKey();
+			if ($iKey < 0)
+			{
+				// Object not yet in the Database
+				$iKey = MetaModel::GetNextKey(get_class($this));
+			}
+			$sName = sprintf('C-%06d', $iKey);
+			$this->Set('ref', $sName);
 		}
-		$sName = sprintf('C-%06d', $iKey);
-		$this->Set('ref', $sName);
 	}
 
 	/**
diff --git a/modules/itop-incident-mgmt-1.0.0/model.itop-incident-mgmt.php b/modules/itop-incident-mgmt-1.0.0/model.itop-incident-mgmt.php
index 49c55dd36..dc7cb1a70 100644
--- a/modules/itop-incident-mgmt-1.0.0/model.itop-incident-mgmt.php
+++ b/modules/itop-incident-mgmt-1.0.0/model.itop-incident-mgmt.php
@@ -52,14 +52,19 @@ class Incident extends ResponseTicket
 
 	public function ComputeValues()
 	{
-		$iKey = $this->GetKey();
-		if ($iKey < 0)
+		$sCurrRef = $this->Get('ref');
+		if (strlen($sCurrRef) == 0)
 		{
-			// Object not yet in the Database
-			$iKey = MetaModel::GetNextKey(get_class($this));
+			$iKey = $this->GetKey();
+			if ($iKey < 0)
+			{
+				// Object not yet in the Database
+				$iKey = MetaModel::GetNextKey(get_class($this));
+			}
+			$sName = sprintf('I-%06d', $iKey);
+			$this->Set('ref', $sName);
 		}
-		$sName = sprintf('I-%06d', $iKey);
-		$this->Set('ref', $sName);
+
 		return parent::ComputeValues();
 	}
 
diff --git a/modules/itop-problem-mgmt-1.0.0/model.itop-problem-mgmt.php b/modules/itop-problem-mgmt-1.0.0/model.itop-problem-mgmt.php
index f3daff62c..3c9f4c97d 100644
--- a/modules/itop-problem-mgmt-1.0.0/model.itop-problem-mgmt.php
+++ b/modules/itop-problem-mgmt-1.0.0/model.itop-problem-mgmt.php
@@ -209,17 +209,21 @@ class Problem extends Ticket
 
 	public function ComputeValues()
 	{
-                // Compute the priority of the ticket
-                $this->Set('priority', $this->ComputePriority());
+		// Compute the priority of the ticket
+		$this->Set('priority', $this->ComputePriority());
 
-		$iKey = $this->GetKey();
-		if ($iKey < 0)
+		$sCurrRef = $this->Get('ref');
+		if (strlen($sCurrRef) == 0)
 		{
-			// Object not yet in the Database
-			$iKey = MetaModel::GetNextKey(get_class($this));
+			$iKey = $this->GetKey();
+			if ($iKey < 0)
+			{
+				// Object not yet in the Database
+				$iKey = MetaModel::GetNextKey(get_class($this));
+			}
+			$sName = sprintf('P-%06d', $iKey);
+			$this->Set('ref', $sName);
 		}
-		$sName = sprintf('P-%06d', $iKey);
-		$this->Set('ref', $sName);
 	}
 
 }
diff --git a/modules/itop-request-mgmt-1.0.0/model.itop-request-mgmt.php b/modules/itop-request-mgmt-1.0.0/model.itop-request-mgmt.php
index 4edf59464..ed939b330 100644
--- a/modules/itop-request-mgmt-1.0.0/model.itop-request-mgmt.php
+++ b/modules/itop-request-mgmt-1.0.0/model.itop-request-mgmt.php
@@ -75,14 +75,19 @@ class UserRequest extends ResponseTicket
 
 	public function ComputeValues()
 	{
-		$iKey = $this->GetKey();
-		if ($iKey < 0)
+		$sCurrRef = $this->Get('ref');
+		if (strlen($sCurrRef) == 0)
 		{
-			// Object not yet in the Database
-			$iKey = MetaModel::GetNextKey(get_class($this));
+			$iKey = $this->GetKey();
+			if ($iKey < 0)
+			{
+				// Object not yet in the Database
+				$iKey = MetaModel::GetNextKey(get_class($this));
+			}
+			$sName = sprintf('R-%06d', $iKey);
+			$this->Set('ref', $sName);
 		}
-		$sName = sprintf('R-%06d', $iKey);
-		$this->Set('ref', $sName);
+
 		return parent::ComputeValues();
 	}