A temporary patch has been applied to hopefully address this issue (A more permanent fix is in the works). Unfortunately, if you are already experiencing this issue, we need to manually clear that date. The patch will now attempt to merge the conflicting entries. Please neomail dmitri_stanislaus or post on our new subreddit. That being said, it is recommended you keep a copy of your sales history for a week or so. (we are currently addressing issues with the database)