This workbook contains one or more lists with changes that have not been synchronized with the server running (!idspnSharePointFoundation_NV). ...

This workbook contains one or more lists with changes that have not been synchronized with the server running (!idspnSharePointFoundation_NV). If you don't want to keep these changes, but you want to be able to edit these lists, you will have to discard the changes and refresh the lists. Do you want to load the pending changes?