Ticket #21229: Screenshot (395).png

In this layer. Both features have same UniqueID (Duplicate) tag as you can see in tag column. Where as UniqueID should be different. So now here there is only two features so we can easily find out that UniqueID is duplicate. But if we have huge data and more features how to find out the duplicate UniqueID?. I need the script to run to find out duplicates if possible please.