
I also began encountering this issue on a SharePoint list I manage within the past week. I tested adding data column by column (luckily just a few) and identified the issue to be related to a URL link column. SyncIssues CSV that generates from the error indicates a duplication of the URL entered in the SharePoint list form. (i.e. https://domain.com/, https://domain.com/) I can add an item to my list entering everything else and then after sync completes, go back and add the URL to the item. Fortunately, this issue is not happening on other lists I update that also have a URL column.