There is no new data coming through to that index. This data is for 2017.
hi prateedshetty,
let me understand:
Case 1, see https://docs.splunk.com/Documentation/Splunk/7.0.2/Indexer/Moveanindex
Case 2, change destination in outputs.conf of your forwarders.
Case 3, go in [Settings -- Receive and Forwarding -- Forwarding] and configure forwarding to the new Indexer.
Bye.
Giuseppe