AGS import errors


I'm trying to import some AGS data from a long gone GI.  The checker and Holebase are both identifying a number of "Data in column XXXX is different than data already stored.  Original data will be kept" errors and based on that statement I can't see why they should present an issue.  Whilst I don't mind manually fixing some, given there are 309 of them between the files I'd rather not fix ones I don't need to.  Screenshot from the checker attached.  It would be good to know which are likely to be preventing import.