Hello @Sukumar Vinnakota ,
Thanks for the question and using MS Q&A platform.
This is an expected behaviour.
Note: The search functionality doesn't have a logic to check whether there is a linked service already exists or not in the ADF. It just provide with an option to directly create a linked service over the data you search from Azure Purview. .
You can directly create Linked Service, Dataset, or dataflow over the data you search by Azure Purview.
For more details, refer to Using Azure Purview in Data Factory.
Hope this helps. Do let us know if you any further queries.
---------------------------------------------------------------------------
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.