Splunk AppDynamics On-Premises 24.x includes Events Service that uses Elasticsearch 8.10.4 version whereas, Events Service Cluster 4.5.x uses Elasticsearch 2.4.1 version. If your Events Service is running with 4.5.x, you must migrate data from Elasticsearch 2.4.1 to 8.10.4 version. Splunk AppDynamics provides a migration utility that helps you migrate the data. If your Events Service running with 23.x version, we recommend you to upgrade the Events Service to >=24.4.0.