On premise Appian migration from 20.1 to 21.2 Data server fail to starthttps://community.appian.com/discussions/f/general/21276/on-premise-appian-migration-from-20-1-to-21-2-data-server-fail-to-startI am migrating Appian instance from 20.1 to 21.2. Post migration, I am receiving error is starting the Data Server. Log file name : Wachdog.log Per Log: The data server historical store (hs) folder and snapshot(ss) are not empty which is the caseen-USTelligent Community 12RE: On premise Appian migration from 20.1 to 21.2 Data server fail to starthttps://community.appian.com/thread/135349?ContentTypeID=1Wed, 15 May 2024 13:43:55 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:55498231-7a3b-4ac7-a306-8bb004b976d3sushmab0001<p>what are steps required to resolve this.?</p><div style="clear:both;"></div>RE: On premise Appian migration from 20.1 to 21.2 Data server fail to starthttps://community.appian.com/thread/82990?ContentTypeID=1Fri, 25 Jun 2021 17:11:45 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:6f466f42-92b7-45f2-8764-c53152760b0bsharads<p>Resolved: The kafka log files were not migrated properly. Once it was migrated correctly, the data sever started with no error.</p><div style="clear:both;"></div>