You could try to check if this product with ID 341 is not still attached as a related product to some of product.
No. It is deleted product.
This time, I can fix it manualy by creating new product and chenging its ID to 341 in virtuemart_products and virtuemart_products_ru_ru tables in DB.
But I tired to fix it every time. This error message dont help any way, just irritate.
Best solve may be to disable this message at all.