When a checkin in Koha returns "data_corrupted," the checkin fails and koha displays the message "The item has not been checked in due to a configuration issue in your system. You must ask an administrator to take a look at the about page and correct all errors shown on the "System information."" This message should be more specific and accurate, as there are a wide variety of potential causes and not all of them are reported in any way in the About page.