DuplicateKeyException

Hello Asawari,

Thank you for your time and detailed information, I am using Graylog along with Mongo and Opensearch.
I want to remove duplicate keys from graylog.users index: unique_username can you provide me exact command to locate these data, since I am not able to get these details.
and by referring few post over the internet I am removing collection itself to resolve this issue.

Please guide me here