diff --git a/htdocs/core/lib/modulebuilder.lib.php b/htdocs/core/lib/modulebuilder.lib.php
index c1fbaaa3e17..6703bb21b3d 100644
--- a/htdocs/core/lib/modulebuilder.lib.php
+++ b/htdocs/core/lib/modulebuilder.lib.php
@@ -496,12 +496,14 @@ function compareFirstValue($a, $b)
  * Rewriting all permissions after any actions
  * @param string      $file            filename or path
  * @param array       $permissions     permissions existing in file
- * @param int|null         $key             key for permission needed
+ * @param int|null    $key             key for permission needed
  * @param array|null  $right           $right to update or add
- * @param int         $action          0 for delete, 1 for add, 2 for update
+ * @param string|null $objectname      name of object
+ * @param string|null $module          name of module
+ * @param int         $action          0 for delete, 1 for add, 2 for update, -1 when delete object completly, -2 for generate rights after add
  * @return int                         1 if OK,-1 if KO
  */
-function reWriteAllPermissions($file, $permissions, $key, $right, $action)
+function reWriteAllPermissions($file, $permissions, $key, $right, $objectname, $module, $action)
 {
 	$error = 0;
 	$rights = array();
@@ -513,6 +515,42 @@ function reWriteAllPermissions($file, $permissions, $key, $right, $action)
 	} elseif ($action == 2 && !empty($right)) {
 		// update right from permissions array
 		array_splice($permissions, array_search($permissions[$key], $permissions), 1, $right);
+	} elseif ($action == -1 && !empty($objectname)) {
+		// when delete object
+		$key = null;
+		$right = null;
+		foreach ($permissions as $perms) {
+			if ($perms[4] === strtolower($objectname)) {
+				array_splice($permissions, array_search($perms, $permissions), 1);
+			}
+		}
+	} elseif ($action == -2 && !empty($objectname) && !empty($module)) {
+		$key= null;
+		$right = null;
+		$objectOfRights = array();
+		//check if object already declared in rights file
+		foreach ($permissions as $right) {
+			$objectOfRights[]= $right[4];
+		}
+		if (in_array(strtolower($objectname), $objectOfRights)) {
+			$error++;
+		} else {
+			$permsToadd = array();
+			$perms = array(
+				'read' => 'Read objects of '.ucfirst($module),
+				'write' => 'Create/Update objects of '.ucfirst($module),
+				'delete' => 'Delete objects of '.ucfirst($module)
+			);
+			$i = 0;
+			foreach ($perms as $index => $value) {
+				$permsToadd[$i][0] = '';
+				$permsToadd[$i][1] = $value;
+				$permsToadd[$i][4] = strtolower($objectname);
+				$permsToadd[$i][5] = $index;
+				array_push($permissions, $permsToadd[$i]);
+				$i++;
+			}
+		}
 	} else {
 		$error++;
 	}
diff --git a/htdocs/langs/en_US/errors.lang b/htdocs/langs/en_US/errors.lang
index 57bd4a861d2..f8b9bfc1be3 100644
--- a/htdocs/langs/en_US/errors.lang
+++ b/htdocs/langs/en_US/errors.lang
@@ -352,6 +352,7 @@ WarningThemeForcedTo=Warning, theme has been forced to <b>%s</b> by hidden const
 WarningPagesWillBeDeleted=Warning, this will also delete all existing pages/containers of the website. You should export your website before, so you have a backup to re-import it later.
 WarningAutoValNotPossibleWhenStockIsDecreasedOnInvoiceVal=Automatic validation is disabled when option to decrease stock is set on "Invoice validation".
 WarningModuleNeedRefrech = Module <b>%s</b> has been disabled. Don't forget to enable it 
+WarningPermissionAlreadyExist=Existing permissions for this object
 
 # Validate
 RequireValidValue = Value not valid
diff --git a/htdocs/langs/fr_FR/errors.lang b/htdocs/langs/fr_FR/errors.lang
index c009fd777ec..bfdf0de44bd 100644
--- a/htdocs/langs/fr_FR/errors.lang
+++ b/htdocs/langs/fr_FR/errors.lang
@@ -350,6 +350,7 @@ WarningThemeForcedTo=Attention, le choix du thème a été forcé à <b> %s </b>
 WarningPagesWillBeDeleted=Attention, cela supprimera également toutes les pages/conteneurs existants du site. Vous devriez exporter votre site Web avant, afin d'avoir une sauvegarde pour le réimporter plus tard.
 WarningAutoValNotPossibleWhenStockIsDecreasedOnInvoiceVal=La validation automatique est désactivée lorsque l'option de diminution du stock est définie sur "Validation de la facture".
 WarningModuleNeedRefrech = Le module <b>%s</b> a été désactivé. N'oubliez pas de le réactiver
+WarningPermissionAlreadyExist=Permissions déja éxistante pour cet objet
 
 # Validate
 RequireValidValue = Valeur non valide
diff --git a/htdocs/modulebuilder/index.php b/htdocs/modulebuilder/index.php
index 258dc229aeb..6a18b405ca2 100644
--- a/htdocs/modulebuilder/index.php
+++ b/htdocs/modulebuilder/index.php
@@ -1283,41 +1283,11 @@ if ($dirins && $action == 'initobject' && $module && $objectname) {
 				}
 			}
 			$rights = $moduleobj->rights;
-			$obj = array();
-			$existRight = 0;
-			foreach ($rights as $right) {
-				$obj[]= $right[4];
-			}
+			$moduledescriptorfile = $destdir.'/core/modules/mod'.$module.'.class.php';
 
-			if (in_array(strtolower($firstobjectname), $obj)) {
-				$rightToadd = preg_replace('/myobject/', $objectname, $rightToadd);
-			}
-			if (in_array(strtolower($objectname), $obj)) {
-				$existRight++;
-				setEventMessages($langs->trans("PermissionAlreadyExist", $langs->transnoentities($objectname)), null, 'errors');
-			}
-			if ($objectname != $firstobjectname) {
-				$rightToadd = "
-		\$this->rights[\$r][0] = \$this->numero . sprintf('%02d', \$r + 1);
-		\$this->rights[\$r][1] = 'Read objects of ".$module."';
-		\$this->rights[\$r][4] = '".strtolower($objectname)."';
-		\$this->rights[\$r][5] = 'read';
-		\$r++;
-		\$this->rights[\$r][0] = \$this->numero . sprintf('%02d', \$r + 1);
-		\$this->rights[\$r][1] = 'Create/Update objects of ".$module."';
-		\$this->rights[\$r][4] = '".strtolower($objectname)."';
-		\$this->rights[\$r][5] = 'write';
-		\$r++;
-		\$this->rights[\$r][0] = \$this->numero . sprintf('%02d', \$r + 1);
-		\$this->rights[\$r][1] = 'Delete objects of ".$module."';
-		\$this->rights[\$r][4] = '".strtolower($objectname)."';
-		\$this->rights[\$r][5] = 'delete';
-		\$r++;
-		";
-				$moduledescriptorfile = $destdir.'/core/modules/mod'.$module.'.class.php';
-				if (!$existRight) {
-					dolReplaceInFile($moduledescriptorfile, array('/* END MODULEBUILDER PERMISSIONS */' => '/*'.strtoupper($objectname).'*/'.$rightToadd."/*END ".strtoupper($objectname).'*/'."\n\t\t".'/* END MODULEBUILDER PERMISSIONS */'));
-				}
+			$generatePerms = reWriteAllPermissions($moduledescriptorfile, $rights, null, null, $objectname, $module, -2);
+			if ($generatePerms < 0) {
+				setEventMessages($langs->trans("WarningPermissionAlreadyExist", $langs->transnoentities($objectname)), null, 'warnings');
 			}
 		}
 
@@ -1923,26 +1893,12 @@ if ($dirins && $action == 'confirm_deleteobject' && $objectname) {
 		$check = dolReplaceInFile($moduledescriptorfile, array('/*LEFTMENU '.strtoupper($objectname).'*/'."\n" => '',"\t\t".'/*END LEFTMENU '.strtoupper($objectname).'*/'."\n" => ''));
 
 		// regenerate permissions and delete them
-		$rights = "
-		\$this->rights[\$r][0] = \$this->numero . sprintf('%02d', \$r + 1);
-		\$this->rights[\$r][1] = 'Read objects of ".$module."';
-		\$this->rights[\$r][4] = '".strtolower($objectname)."';
-		\$this->rights[\$r][5] = 'read';
-		\$r++;
-		\$this->rights[\$r][0] = \$this->numero . sprintf('%02d', \$r + 1);
-		\$this->rights[\$r][1] = 'Create/Update objects of ".$module."';
-		\$this->rights[\$r][4] = '".strtolower($objectname)."';
-		\$this->rights[\$r][5] = 'write';
-		\$r++;
-		\$this->rights[\$r][0] = \$this->numero . sprintf('%02d', \$r + 1);
-		\$this->rights[\$r][1] = 'Delete objects of ".$module."';
-		\$this->rights[\$r][4] = '".strtolower($objectname)."';
-		\$this->rights[\$r][5] = 'delete';
-		\$r++;
-		";
-
-		$deleteright = dolReplaceInFile($moduledescriptorfile, array('/*'.strtoupper($objectname).'*/' => '', $rights => '', "/*END ".strtoupper($objectname).'*/'."\n\t\t" => "\n\t\t"));
-
+		$permissions = $moduleobj->rights;
+		reWriteAllPermissions($moduledescriptorfile, $permissions, null, null, $objectname, '', -1);
+		clearstatcache(true);
+		if (function_exists('opcache_invalidate')) {
+			opcache_reset();
+		}
 		$resultko = 0;
 		foreach ($filetodelete as $tmpfiletodelete) {
 			$resulttmp = dol_delete_file($dir.'/'.$tmpfiletodelete, 0, 0, 1);
@@ -2137,7 +2093,7 @@ if ($dirins && $action == 'addright' && !empty($module) && empty($cancel)) {
 
 		$moduledescriptorfile = $dirins.'/'.strtolower($module).'/core/modules/mod'.$module.'.class.php';
 		//rewriting all permissions after add a right
-		reWriteAllPermissions($moduledescriptorfile, $permissions, $key, $rightToAdd, 1);
+		reWriteAllPermissions($moduledescriptorfile, $permissions, $key, $rightToAdd, '', '', 1);
 		setEventMessages($langs->trans('PermissionAddedSuccesfuly'), null);
 
 		if (isModEnabled(strtolower($module))) {
@@ -2250,7 +2206,7 @@ if ($dirins && GETPOST('action') == 'update_right' && GETPOST('modifyright')&& e
 
 		$moduledescriptorfile = $dirins.'/'.strtolower($module).'/core/modules/mod'.$module.'.class.php';
 		// rewriting all permissions after update permission needed
-		reWriteAllPermissions($moduledescriptorfile, $permissions, $key, $rightUpdated, 2);
+		reWriteAllPermissions($moduledescriptorfile, $permissions, $key, $rightUpdated, '', '', 2);
 
 		setEventMessages($langs->trans('PermissionUpdatedSuccesfuly'), null);
 
@@ -2286,7 +2242,7 @@ if ($dirins && $action == 'confirm_deleteright' && !empty($module) && GETPOST('p
 		$moduledescriptorfile = $dirins.'/'.strtolower($module).'/core/modules/mod'.$module.'.class.php';
 
 		// rewriting all permissions
-		reWriteAllPermissions($moduledescriptorfile, $permissions, $key, '', 0);
+		reWriteAllPermissions($moduledescriptorfile, $permissions, $key, null, '', '', 0);
 
 		// check if module is enabled
 		if (isModEnabled(strtolower($module))) {