How to edit product prices without affecting variant weight in CSV bulk upload?

So I’m editing the price in bulk using CSV and I don’t want it to edit the Variant Weight because I’m editing the Variant Weight via Bulk in the product settings. What should I do, input “0” or just clear the column of Variant Weight? Or is there a way for the weight to not be affected when I reupload it the csv in the store?

Also, does reuploading the csv file retains the images uploaded in the products of the store?

Thank you very much!

I think if you clear the column it will only update the columns with information.