Hi, @Dhanushn 

In response to your question, the community contains the following information:

https://community.databricks.com/t5/community-platform-discussions/concurrent-update-to-delta-throws...

https://kb.databricks.com/en_US/delta/insert-operation-fails-while-trying-to-execute-multiple-concur...

Additionally, you may have already seen it, but here’s a link to the relevant section in the official documentation.

https://docs.databricks.com/en/optimizations/isolation-level.html#concurrentappendexception

I hope this information is helpful to you!