diff --git a/core/autoload.php b/core/autoload.php
index 15eb719a1..3e15bb6cd 100644
--- a/core/autoload.php
+++ b/core/autoload.php
@@ -33,6 +33,7 @@ MetaModel::IncludeModule('core/tagsetfield.class.inc.php');
 MetaModel::IncludeModule('synchro/synchrodatasource.class.inc.php');
 MetaModel::IncludeModule('core/backgroundtask.class.inc.php');
 MetaModel::IncludeModule('core/inlineimage.class.inc.php');
+MetaModel::IncludeModule('core/counter.class.inc.php');
 
 MetaModel::IncludeModule('webservices/webservices.basic.php');
 
diff --git a/core/cmdbsource.class.inc.php b/core/cmdbsource.class.inc.php
index 72d070d61..800ac3614 100644
--- a/core/cmdbsource.class.inc.php
+++ b/core/cmdbsource.class.inc.php
@@ -793,6 +793,9 @@ class CMDBSource
 	}
 
 	/**
+	 *
+	 * @deprecated 2.7.0 N°1627 use ItopCounter insted
+	 *
 	 * @param string $sTable
 	 *
 	 * @return int
diff --git a/core/counter.class.inc.php b/core/counter.class.inc.php
new file mode 100644
index 000000000..84b4b5894
--- /dev/null
+++ b/core/counter.class.inc.php
@@ -0,0 +1,162 @@
+<?php
+/**
+ * Copyright (C) 2013-2019 Combodo SARL
+ *
+ * This file is part of iTop.
+ *
+ * iTop is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * iTop is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ */
+
+
+/**
+ * Class ItopCounter
+ *
+ */
+final class ItopCounter
+{
+	/**
+	 * Key based counter.
+	 * The counter is protected against concurrency script.
+	 *
+	 * @param $sCounterName
+	 * @param null|callable $oNewObjectValueProvider optional callable that must return an integer. Used when no key is found
+	 *
+	 * @return int the counter starting at
+	 *  * `0` when no $oNewObjectValueProvider is given (or null)
+	 *  * `$oNewObjectValueProvider() + 1` otherwise
+	 *
+	 * @throws \ArchivedObjectException
+	 * @throws \CoreCannotSaveObjectException
+	 * @throws \CoreException
+	 * @throws \CoreOqlMultipleResultsForbiddenException
+	 * @throws \CoreUnexpectedValue
+	 * @throws \MySQLException
+	 * @throws \OQLException
+	 */
+	public static function Inc($sCounterName, $oNewObjectValueProvider = null)
+	{
+		$sSelfClassName = self::class;
+		$oiTopMutex = new iTopMutex("$sSelfClassName-$sCounterName");
+		$oiTopMutex->Lock();
+
+		$oFilter = DBObjectSearch::FromOQL('SELECT KeyValueStore WHERE key_name=:key_name', array(
+			'key_name' => $sCounterName,
+		));
+		$oCounter = $oFilter->GetFirstResult();
+		if (is_null($oCounter))
+		{
+			if (null != $oNewObjectValueProvider)
+			{
+				$iComputedValue = $oNewObjectValueProvider();
+			}
+			else
+			{
+				$iComputedValue = 0;
+			}
+			$oCounter = MetaModel::NewObject('KeyValueStore', array(
+				'key_name' => $sCounterName,
+				'value' => $iComputedValue,
+			));
+		}
+
+		$iCurrentValue = (int) $oCounter->Get('value');
+		$iCurrentValue++;
+
+		$oCounter->Set('value', $iCurrentValue);
+		$oCounter->DBWrite();
+
+		$oiTopMutex->Unlock();
+
+		return $iCurrentValue;
+	}
+
+	/**
+	 * handle a counter for the root class of given $sLeafClass.
+	 * If no counter exist initialize it with the `max(id) + 1`
+	 *
+	 * @param $sLeafClass
+	 *
+	 * @return int
+	 * @throws \ArchivedObjectException
+	 * @throws \CoreCannotSaveObjectException
+	 * @throws \CoreException
+	 * @throws \CoreOqlMultipleResultsForbiddenException
+	 * @throws \CoreUnexpectedValue
+	 * @throws \MySQLException
+	 * @throws \OQLException
+	 */
+	public static function IncClass($sLeafClass)
+	{
+		$sRootClass = MetaModel::GetRootClass($sLeafClass);
+
+		$oNewObjectCallback = function() use ($sRootClass)
+		{
+			$sRootTable = MetaModel::DBGetTable($sRootClass);
+			$sIdField = MetaModel::DBGetKey($sRootClass);
+
+			return CMDBSource::QueryToScalar("SELECT max(`$sIdField`) FROM `$sRootTable`");
+		};
+
+		return self::Inc($sRootClass, $oNewObjectCallback);
+	}
+}
+
+
+
+/**
+ * Persistent classes for a CMDB
+ *
+ * @copyright   Copyright (C) 2010-2017 Combodo SARL
+ * @license     http://opensource.org/licenses/AGPL-3.0
+ */
+
+class KeyValueStore extends DBObject
+{
+	public static function Init()
+	{
+		$aParams = array(
+			'category' => 'bizmodel',
+			'key_type' => 'autoincrement',
+			'name_attcode' => array('key_name'),
+			'state_attcode' => '',
+			'reconc_keys' => array(''),
+			'db_table' => 'key_value_store',
+			'db_key_field' => 'id',
+			'db_finalclass_field' => '',
+			'indexes' => array (
+				array (
+					0 => 'key_name',
+				),
+			),);
+		MetaModel::Init_Params($aParams);
+		MetaModel::Init_InheritAttributes();
+		MetaModel::Init_AddAttribute(new AttributeString("key_name", array("allowed_values"=>null, "sql"=>'key_name', "default_value"=>'', "is_null_allowed"=>false, "depends_on"=>array(), "always_load_in_tables"=>false)));
+		MetaModel::Init_AddAttribute(new AttributeString("value", array("allowed_values"=>null, "sql"=>'value', "default_value"=>'0', "is_null_allowed"=>false, "depends_on"=>array(), "always_load_in_tables"=>false)));
+
+		MetaModel::Init_SetZListItems('details', array (
+			0 => 'key_name',
+			1 => 'value',
+		));
+		MetaModel::Init_SetZListItems('standard_search', array (
+			0 => 'key_name',
+			1 => 'value',
+		));
+		MetaModel::Init_SetZListItems('list', array (
+			0 => 'key_name',
+			1 => 'value',
+		));
+		;
+	}
+
+
+}
\ No newline at end of file
diff --git a/core/metamodel.class.php b/core/metamodel.class.php
index 12a2eb3d8..05619a7eb 100644
--- a/core/metamodel.class.php
+++ b/core/metamodel.class.php
@@ -6935,6 +6935,8 @@ abstract class MetaModel
 	}
 
 	/**
+	 * @deprecated 2.7.0 N°1627, use ItopCounter::incRootClass($sClass) instead
+	 *
 	 * @param string $sClass
 	 *
 	 * @return int
@@ -6942,10 +6944,7 @@ abstract class MetaModel
 	 */
 	public static function GetNextKey($sClass)
 	{
-		$sRootClass = MetaModel::GetRootClass($sClass);
-		$sRootTable = MetaModel::DBGetTable($sRootClass);
-
-		return CMDBSource::GetNextInsertId($sRootTable);
+		return ItopCounter::IncClass($sClass);
 	}
 
 	/**
diff --git a/lib/composer/autoload_classmap.php b/lib/composer/autoload_classmap.php
index 367d3a488..522d0d941 100644
--- a/lib/composer/autoload_classmap.php
+++ b/lib/composer/autoload_classmap.php
@@ -140,6 +140,9 @@ return array(
     'ContextTag' => $baseDir . '/core/contexttag.class.inc.php',
     'CoreCannotSaveObjectException' => $baseDir . '/core/coreexception.class.inc.php',
     'CoreException' => $baseDir . '/core/coreexception.class.inc.php',
+    'CoreOqlException' => $baseDir . '/core/coreexception.class.inc.php',
+    'CoreOqlMultipleResultsForbiddenException' => $baseDir . '/core/coreexception.class.inc.php',
+    'CorePortalInvalidActionRuleException' => $baseDir . '/core/coreexception.class.inc.php',
     'CoreServices' => $baseDir . '/core/restservices.class.inc.php',
     'CoreUnexpectedValue' => $baseDir . '/core/coreexception.class.inc.php',
     'CoreWarning' => $baseDir . '/core/coreexception.class.inc.php',
@@ -255,8 +258,10 @@ return array(
     'Introspection' => $baseDir . '/core/introspection.class.inc.php',
     'InvalidConfigParamException' => $baseDir . '/core/coreexception.class.inc.php',
     'IssueLog' => $baseDir . '/core/log.class.inc.php',
+    'ItopCounter' => $baseDir . '/core/counter.class.inc.php',
     'JSButtonItem' => $baseDir . '/application/applicationextension.inc.php',
     'JSPopupMenuItem' => $baseDir . '/application/applicationextension.inc.php',
+    'KeyValueStore' => $baseDir . '/core/counter.class.inc.php',
     'ListExpression' => $baseDir . '/core/oql/expression.class.inc.php',
     'ListOqlExpression' => $baseDir . '/core/oql/oqlquery.class.inc.php',
     'LogAPI' => $baseDir . '/core/log.class.inc.php',
diff --git a/lib/composer/autoload_static.php b/lib/composer/autoload_static.php
index d0bcd7557..5475b2b2a 100644
--- a/lib/composer/autoload_static.php
+++ b/lib/composer/autoload_static.php
@@ -361,6 +361,9 @@ class ComposerStaticInit0018331147de7601e7552f7da8e3bb8b
         'ContextTag' => __DIR__ . '/../..' . '/core/contexttag.class.inc.php',
         'CoreCannotSaveObjectException' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
         'CoreException' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
+        'CoreOqlException' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
+        'CoreOqlMultipleResultsForbiddenException' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
+        'CorePortalInvalidActionRuleException' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
         'CoreServices' => __DIR__ . '/../..' . '/core/restservices.class.inc.php',
         'CoreUnexpectedValue' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
         'CoreWarning' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
@@ -476,8 +479,10 @@ class ComposerStaticInit0018331147de7601e7552f7da8e3bb8b
         'Introspection' => __DIR__ . '/../..' . '/core/introspection.class.inc.php',
         'InvalidConfigParamException' => __DIR__ . '/../..' . '/core/coreexception.class.inc.php',
         'IssueLog' => __DIR__ . '/../..' . '/core/log.class.inc.php',
+        'ItopCounter' => __DIR__ . '/../..' . '/core/counter.class.inc.php',
         'JSButtonItem' => __DIR__ . '/../..' . '/application/applicationextension.inc.php',
         'JSPopupMenuItem' => __DIR__ . '/../..' . '/application/applicationextension.inc.php',
+        'KeyValueStore' => __DIR__ . '/../..' . '/core/counter.class.inc.php',
         'ListExpression' => __DIR__ . '/../..' . '/core/oql/expression.class.inc.php',
         'ListOqlExpression' => __DIR__ . '/../..' . '/core/oql/oqlquery.class.inc.php',
         'LogAPI' => __DIR__ . '/../..' . '/core/log.class.inc.php',