I checked SPlunk ITSI documentation and it says the version it supports is 6.3.
Will it not work with Splunk 6.2?
ITSI v2.0 requires Core Splunk v6.3, on at least the Search Head(s). You can run 6.2.5 (or later) on the indexers. In such an environment, you should probably put ITSI on a separate (stand-alone) search head.