Wipes the existing database and replaces it entirely with the uploaded CSV.
Used if the CSV doesn't include a month column.
Expected CSV columns
VRM, Make, Model, Derivative, Year, Mileage, Fuel Type, Transmission, Grade, Mechanical Grade, Sale Location, CAP Below Average, CAP Average, CAP Clean, CAP Retail, CAP New, Scrape Month
Column names are flexible. Duplicate VRM + scrape month combinations are automatically skipped.