diff --git a/htdocs/adherents/card.php b/htdocs/adherents/card.php
index f7b900feaa4..43747513c96 100644
--- a/htdocs/adherents/card.php
+++ b/htdocs/adherents/card.php
@@ -278,7 +278,7 @@ if (empty($reshook)) {
 		}
 		// Create new object
 		if ($result > 0 && !$error) {
-			$object->oldcopy = clone $object;
+			$object->oldcopy = dol_clone($object);
 
 			// Change values
 			$object->civility_id = trim(GETPOST("civility_id", 'alphanohtml'));
diff --git a/htdocs/adherents/type.php b/htdocs/adherents/type.php
index f3d5f96a78a..e37d52480fa 100644
--- a/htdocs/adherents/type.php
+++ b/htdocs/adherents/type.php
@@ -170,7 +170,8 @@ if ($action == 'add' && $user->rights->adherent->configurer) {
 if ($action == 'update' && $user->rights->adherent->configurer) {
 	$object->fetch($rowid);
 
-	$object->oldcopy = clone $object;
+	$object->oldcopy = dol_clone($object);
+
 	$object->label= trim($label);
 	$object->morphy	= trim($morphy);
 	$object->status	= (int) $status;
diff --git a/htdocs/comm/action/card.php b/htdocs/comm/action/card.php
index 6f97b3f134d..6dd6cd5663b 100644
--- a/htdocs/comm/action/card.php
+++ b/htdocs/comm/action/card.php
@@ -677,7 +677,7 @@ if (empty($reshook) && $action == 'update') {
 		$object->fetch($id);
 		$object->fetch_optionals();
 		$object->fetch_userassigned();
-		$object->oldcopy = clone $object;
+		$object->oldcopy = dol_clone($object);
 
 		// Clean parameters
 		if ($fulldayevent) {
@@ -927,7 +927,7 @@ if (empty($reshook) && $action == 'confirm_delete' && GETPOST("confirm") == 'yes
 	$object->fetch($id);
 	$object->fetch_optionals();
 	$object->fetch_userassigned();
-	$object->oldcopy = clone $object;
+	$object->oldcopy = dol_clone($object);
 
 	if ($user->rights->agenda->myactions->delete
 		|| $user->rights->agenda->allactions->delete) {
diff --git a/htdocs/comm/action/index.php b/htdocs/comm/action/index.php
index 2afad30c454..c60f10be857 100644
--- a/htdocs/comm/action/index.php
+++ b/htdocs/comm/action/index.php
@@ -212,7 +212,7 @@ if (GETPOST("viewperuser", 'alpha') || $mode == 'show_peruser') {
  $event->fetch($actionid);
  $event->fetch_optionals();
  $event->fetch_userassigned();
- $event->oldcopy = clone $event;
+ $event->oldcopy = dol_clone($event);
 
  $result = $event->delete();
  }
diff --git a/htdocs/comm/action/pertype.php b/htdocs/comm/action/pertype.php
index 85eb355f2b6..d21b20bbfaf 100644
--- a/htdocs/comm/action/pertype.php
+++ b/htdocs/comm/action/pertype.php
@@ -189,7 +189,7 @@ if ($action == 'delete_action' && $user->rights->agenda->delete) {
 	$event->fetch($actionid);
 	$event->fetch_optionals();
 	$event->fetch_userassigned();
-	$event->oldcopy = clone $event;
+	$event->oldcopy = dol_clone($event);
 
 	$result = $event->delete();
 }
diff --git a/htdocs/comm/action/peruser.php b/htdocs/comm/action/peruser.php
index 87def7240f5..b30ef8f7ba9 100644
--- a/htdocs/comm/action/peruser.php
+++ b/htdocs/comm/action/peruser.php
@@ -196,7 +196,7 @@ if ($action == 'delete_action' && $user->rights->agenda->delete) {
 	$event->fetch($actionid);
 	$event->fetch_optionals();
 	$event->fetch_userassigned();
-	$event->oldcopy = clone $event;
+	$event->oldcopy = dol_clone($event);
 
 	$result = $event->delete();
 }
diff --git a/htdocs/contact/perso.php b/htdocs/contact/perso.php
index 6030fc1e6bd..aa7ba34d9f0 100644
--- a/htdocs/contact/perso.php
+++ b/htdocs/contact/perso.php
@@ -60,7 +60,7 @@ if ($action == 'update' && !GETPOST("cancel") && $user->rights->societe->contact
 
 	$result = $object->update_perso($id, $user);
 	if ($result > 0) {
-		$object->oldcopy = clone $object;
+		$object->oldcopy = dol_clone($object);
 
 		// Logo/Photo save
 		$dir = $conf->societe->dir_output.'/contact/'.get_exdir($object->id, 0, 0, 1, $object, 'contact').'/photos';
diff --git a/htdocs/contrat/class/contrat.class.php b/htdocs/contrat/class/contrat.class.php
index 1e8da8a9a81..8dbcde19d0d 100644
--- a/htdocs/contrat/class/contrat.class.php
+++ b/htdocs/contrat/class/contrat.class.php
@@ -3135,8 +3135,7 @@ class ContratLigne extends CommonObjectLine
 
 		$this->db->begin();
 
-		$this->oldcopy = new ContratLigne($this->db);
-		$this->oldcopy->fetch($this->id);
+		$this->oldcopy = dol_clone($this);
 
 		// Update request
 		$sql = "UPDATE ".MAIN_DB_PREFIX."contratdet SET";
diff --git a/htdocs/core/class/comment.class.php b/htdocs/core/class/comment.class.php
index 937ca6f7875..960d2ac4744 100644
--- a/htdocs/core/class/comment.class.php
+++ b/htdocs/core/class/comment.class.php
@@ -71,19 +71,19 @@ class Comment extends CommonObject
 	public $fk_user_modif;
 
 	/**
-	 * @var int Entity
+	 * @var int 		Entity
 	 */
 	public $entity;
 
 	/**
-	 * @var string import key
+	 * @var string 		Import key
 	 */
 	public $import_key;
 
 	public $comments = array();
 
 	/**
-	 * @var Comment Object oldcopy
+	 * @var Comment 	Object oldcopy
 	 */
 	public $oldcopy;
 
diff --git a/htdocs/fichinter/class/fichinter.class.php b/htdocs/fichinter/class/fichinter.class.php
index 029c5651a32..b832bceb822 100644
--- a/htdocs/fichinter/class/fichinter.class.php
+++ b/htdocs/fichinter/class/fichinter.class.php
@@ -533,7 +533,7 @@ class Fichinter extends CommonObject
 		$resql = $this->db->query($sql);
 		if ($resql) {
 			if (!$error) {
-				$this->oldcopy = clone $this;
+				$this->oldcopy = dol_clone($this);
 			}
 
 			if (!$error) {
@@ -1422,7 +1422,7 @@ class Fichinter extends CommonObject
 			}
 
 			if (!$error) {
-				$this->oldcopy = clone $this;
+				$this->oldcopy = dol_clone($this);
 				$this->ref_client = $ref_client;
 			}
 
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index fde8c453a2e..28ddb32624b 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -1051,9 +1051,7 @@ class Product extends CommonObject
 
 		if ($result >= 0) {
 			if (empty($this->oldcopy)) {
-				$org = new self($this->db);
-				$org->fetch($this->id);
-				$this->oldcopy = $org;
+				$this->oldcopy = dol_clone($this);
 			}
 
 			// Test if batch management is activated on existing product
diff --git a/htdocs/product/stock/class/productlot.class.php b/htdocs/product/stock/class/productlot.class.php
index 0e0f8883f99..3b169055bfa 100644
--- a/htdocs/product/stock/class/productlot.class.php
+++ b/htdocs/product/stock/class/productlot.class.php
@@ -388,9 +388,7 @@ class Productlot extends CommonObject
 		// Put here code to add a control on parameters values
 
 		if (empty($this->oldcopy)) {
-			$org = new self($this->db);
-			$org->fetch($this->id);
-			$this->oldcopy = $org;
+			$this->oldcopy = dol_clone($this);
 		}
 
 		// Update request
diff --git a/htdocs/resource/class/dolresource.class.php b/htdocs/resource/class/dolresource.class.php
index da99b2f2e97..2188d3b0a23 100644
--- a/htdocs/resource/class/dolresource.class.php
+++ b/htdocs/resource/class/dolresource.class.php
@@ -263,9 +263,7 @@ class Dolresource extends CommonObject
 		}
 
 		if (empty($this->oldcopy)) {
-			$org = new self($this->db);
-			$org->fetch($this->id);
-			$this->oldcopy = $org;
+			$this->oldcopy = dol_clone($this);
 		}
 
 		// Update request
diff --git a/htdocs/user/bank.php b/htdocs/user/bank.php
index 6be5afb3753..edae0a6a89a 100644
--- a/htdocs/user/bank.php
+++ b/htdocs/user/bank.php
@@ -149,7 +149,7 @@ if ($action == 'update' && !$cancel && $permissiontoaddbankaccount) {
 			{
 				$objectuser->fetch($id);
 
-				$objectuser->oldcopy = clone $objectuser;
+				$objectuser->oldcopy = dol_clone($objectuser);
 
 				$db->begin();