Need help to understand how to use "Enforce unique values" in SharePoint 2013 Document Library.
I have done below steps but its not working.
In SharePoint 2013 --> Created Document Library --> Created Custom Column "Drawing no" --> Selected "Require that this column contains information" "Yes" & Enforce unique values "Yes"
First Step - When I'm filling save value in Drawing No column its giving message "This value already exists in the list"
Second Step - Now I changed the value from 2 to 3 but not able to save the data in document library. Its showing error "The file Test Unique/Excel - Copy.xlsx has been modified by user1".
However Drawing No. 3 is not exists in list. And instead of checking I select cancel option and now duplicate value 2 is showing in Document Library.