Having a red sign next to the receipt means that the order contained voided products or that the whole receipt was voided.

On the right part, you will see all the details of the receipt, including what products were voided.

You don't need to worry as the cancelled products will not appear on the fiscal receipt, this is only a notification reminding you that either the receipt contained cancelled products, or this was cancelled entirely.

This won't affect the quantity of your stocks as these items were not printed on the fiscal receipt or were not marked as protocol.