Hi! I just started using Wix Code, I really like it, but I'm having a hard time with CSV uploads. I'm used to working with CSV in Prestashop. My CSV continually change, sometimes I add columns, sometimes I eliminate them, sometimes I just change the data. Everytime I upload the new CSV of a dataset, it doesn't substitute anything in the actual CSV, it justa adds more columns (duplicated). Is this normal? Can you please tell me how the CSV uploads work? Because if I have to manually eliminate columns/rows I just see that this is going to be very ineficient.