When I save a Design Table for the first time (Right Click-->Design Table-->Save Table), I'm prompted for the name of the part/assembly and where I'd like to save it. When I click on Save--even if there is no spreadsheet of any kind in the target subdirectory--I receive a warning that says "Cannot save ". The only option is to click on OK, then Solidworks saves the file as "filename_new.xlsx." Why?

As I continue to use the model, rebuilding and saving, eventually "filename_new.xlsx" becomes "filename_new_new.xlsx". I'm sure I'm clicking through some prompt that is causing it, but I can't figure out which one. I'd like to simply overwrite the file each time and not have to worry about creating a new one. (If I want to keep the old one, I'll save off a backup somewhere.) Is there anyway to change this behavior?