It can also be changed in SQL or background system.

However, there are also _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

By the way, do you want to change the previous sales?

You can recover it from the sales journal query in the software. I wonder if the catering system in your has this function. It's a little troublesome anyway. You'd better send the interface and background interface of your catering system.