I exported my StoryGraph data but when opening the file, the ISBN column had excel errors for most of the entries. I opened both with and without converting the data for leading zeroes, and both resulted in this. I was able to fix it by changing the column type to "Number" but not sure if that's something ya'll can dictate in the export as it was definitely confusing for a while! This might be an excel .csv file issue though so maybe this just closes out.