It’s possible that someone is using an existing Org file to export to Hugo. Some exporters like ox-texinfo recognize dates of style YEAR1-YEAR2 to use them in Copyright headers. But that date is invalid as per the standard date format used by Hugo in date front-matter, and also as per org-parse-time-string. So in that case, don’t allow org-parse-time-string to throw an error and abort the export, but instead simply don’t set the date in the front-matter.