I have a simple List (not a document library!) which worked fine for a few weeks. Today our customer called me and reported that an error occures every time a new item is created. I figuered out that the error only occurs when there was already a listitem
with the same value in the "title" column. This is a strange thing, because in most cases there are already multiple items with the same value. The error occurs only on newly added items.
I did some further research and found out that in Sharepoint Designer all the items are displayed as folders! How can that hapen? This must have been changed by someone because this does not happen before. Is it possible to change the list type? Perhaps
our customer did so and damaged the list on this way...
Please could someone give me a hint?
Thank you very much!
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