unable to add addon domains

[ashwani5]

There was a problem creating the addondomain. Show Details
Error from domain wrapper: Domain already exists, it was not added.: bhat.ashwani.in


i get this error always
Edit:
i am trying add bhat.ind.in to my username ashwani5

 

[Scott]

Is this a subdomain or a TLD or CLD?

 

[ashwani5]

please note bhat.ind.in is domain name registered with sify.com
so the www.bhat.ind.in is my domain and .ind.in is domain extention

please clarify what does TLD or CLD means