diff --git a/core/cmdbobject.class.inc.php b/core/cmdbobject.class.inc.php
index 76525316f..0e9dea6fa 100644
--- a/core/cmdbobject.class.inc.php
+++ b/core/cmdbobject.class.inc.php
@@ -95,11 +95,17 @@ abstract class CMDBObject extends DBObject
 	protected static $m_oCurrChange = null;
 	protected static $m_sInfo = null; // null => the information is built in a standard way
 	protected static $m_sOrigin = null; // null => the origin is 'interactive'
-	
+
 	/**
-	 * Specify another change (this is mainly for backward compatibility)
+	 * Specify the change to be used by the API to attach any CMDBChangeOp* object created
+	 *
+	 * @see SetTrackInfo if CurrentChange is null, then a new one will be create using trackinfo
+	 *
+	 * @param CMDBChange|null $oChange use null so that the API will recreate a new CMDBChange using TrackInfo & TrackOrigin
+	 *
+	 * @since 2.7.2 N°3219 can now reset CMDBChange by passing null
 	 */
-	public static function SetCurrentChange(CMDBChange $oChange)
+	public static function SetCurrentChange($oChange)
 	{
 		self::$m_oCurrChange = $oChange;
 	}
@@ -126,11 +132,15 @@ abstract class CMDBObject extends DBObject
 	/**
 	 * Override the additional information (defaulting to user name)
 	 * A call to this verb should replace every occurence of
-	 *    $oMyChange = MetaModel::NewObject("CMDBChange");	  	 
+	 *    $oMyChange = MetaModel::NewObject("CMDBChange");
 	 *    $oMyChange->Set("date", time());
 	 *    $oMyChange->Set("userinfo", 'this is done by ... for ...');
 	 *    $iChangeId = $oMyChange->DBInsert();
-	 */	 	
+	 *
+	 * @see SetCurrentChange to specify a CMDBObject instance instead
+	 *
+	 * @param string $sInfo
+	 */
 	public static function SetTrackInfo($sInfo)
 	{
 		self::$m_sInfo = $sInfo;
@@ -138,8 +148,13 @@ abstract class CMDBObject extends DBObject
 
 	/**
 	 * Provides information about the origin of the change
-	 * @param $sOrigin String: one of: interactive, csv-interactive, csv-import.php, webservice-soap, webservice-rest, syncho-data-source, email-processing, custom-extension
-	 */	 	
+	 *
+	 * @see SetTrackInfo
+	 * @see SetCurrentChange to specify a CMDBObject instance instead
+	 *
+	 * @param $sOrigin String: one of: interactive, csv-interactive, csv-import.php, webservice-soap, webservice-rest, syncho-data-source,
+	 *     email-processing, custom-extension
+	 */
 	public static function SetTrackOrigin($sOrigin)
 	{
 		self::$m_sOrigin = $sOrigin;
diff --git a/webservices/cron.php b/webservices/cron.php
index 145c758fe..6b8ed2e51 100644
--- a/webservices/cron.php
+++ b/webservices/cron.php
@@ -244,8 +244,14 @@ function CronExec($oP, $aProcesses, $bVerbose)
 
 		foreach ($aProcesses as $oProcess)
 		{
-
 			$sTaskClass = get_class($oProcess);
+
+			// N°3219 for each process will use a specific CMDBChange object with a specific track info
+			// Any BackgroundProcess can overrides this as needed
+			CMDBObject::SetCurrentChange(null);
+			CMDBObject::SetTrackInfo("Background task ($sTaskClass)");
+			CMDBObject::SetTrackOrigin(null);
+
 			if (!array_key_exists($sTaskClass, $aTasks))
 			{
 				// New entry, let's create a new BackgroundTask record, and plan the first execution