Update product – delete sale price

Hello,

I turned on the update product but only update quantities.
The problem is that when the plugin automatically updates the product, he updates the stock and delete de sale price.

For example i have a product with 40€ normal price and 30€ sale price.

When the plugin updates, the discount price is deleted and the product appears costing 40€ again without discount.

There is any option to no do that?