LeadMerger::canMergeEntityField

static function canMergeEntityField($fieldID)
{
	//Field ContactID is obsolete. It is replaced by ContactIDs
	//Field StatusID is progress field
	//Field StatusDescription depend on StatusID
	//Field ADDRESS_LOC_ADDR_ID is redundant if other address parts are same
	if($fieldID === 'CONTACT_ID' || $fieldID === 'STATUS_ID' || $fieldID === 'STATUS_DESCRIPTION' || $fieldID === 'ADDRESS_LOC_ADDR_ID')
	{
		return false;
	}
	return parent::canMergeEntityField($fieldID);
}