$currentActivityID = CRM_Core_DAO::singleValueQuery("SELECT MAX(id) FROM civicrm_activity");
$currentActivityID -= 50;
$sourceID = CRM_Utils_Array::key('Activity Source', $activityContacts);
$currentActivityID = CRM_Core_DAO::singleValueQuery("SELECT MAX(id) FROM civicrm_activity");
$currentActivityID -= 50;
$sourceID = CRM_Utils_Array::key('Activity Source', $activityContacts);