Error when updating hierarchies with list items
I'm trying to update a list hierarchy from a module, which I have updated with an import file, and everything seems to be working just fine, that is, my list items are updated. However, since I have the same list item occurring several times in my import file, and also in the module I import from, I get the error message "Another row has already been processed with this key" and then the yellow warning triangle.
Does anyone know how to avoid this? I don't want my client to think that there is an error in the import when it actually worked just fine.
Thanks a lot!