Short answer
No, Index names cannot currently be changed in AskTuring.
Full explanation
Once you create an Index in AskTuring, its name is locked in. There is no option for users to rename an Index at this time. If you need an Index with a different name, the only option is to create a new one and upload the same documents to it.
This limitation helps maintain consistency in how Indexes are tracked in the system. However, the ability to rename an Index will be added in a future release